User manual NORTHSTAR 941X - Reference Guide

ADDENDUM to Northstar 941/941XD GPS Navigator Reference Manual (P/N GM1100, Revision D) This addendum applies to software versions 2.07, 2.10, 3.12, 3.18, and later Northstar Technologies, Inc. 30 Sudbury Road Acton, Massachusetts 01720 (978) 897-6600 P/N GM210 Rev. D 03/21/01 Table of contents About this addendum - - - - - - - - - - - - - - - 1 Contacting Northstar ---------------1 2 2 3 3 4 Software version 2.07 upgrades - - - - - - - - - - - 2 New NMEA output sentence - NMEA 1-Hz output - - - - - Uninstalled DGPS antenna - - Updated beacon list - - - - - Radio frequency interference (RFI) Software version 2.10 upgrades - - - - - - - - - - - 4 Anchor-watch alarm honk - - - - - - - - - Honking for all alarms - - - - - - - - - - - Selecting an independent NMEA output-port datum Canadian tide stations - - - - - - - - - - - Changes to DGPS stations - - - - - - - - - New DGPS stations - - - - - - - - - - - - New DGPS status message - - - - - - - - - Change to RMC sentence display - - - - - - New TLL sentence - - - - - - - - - - - - Changes to GGA output sentence - - - - - - - --4 --5 -7 --7 --7 --8 --8 --8 --8 --9 Software version 3.12 upgrades - - - - - - - - - - - 9 Sharing waypoints and routes - - - - - - - - - - - 9 Time display on the tide track screen - - - - - - - - - 17 Software version 3.18 upgrades - - - - - - - - - WAAS differential capability - - - - - - New WAAS options - - - - - - - - - - Using demo mode to simulate WAAS - - - Viewing distance-to-go on the NAVLOG screen Changes to U.S. DPGS stations - - - - - New U.S. DGPS stations - - - - - - - - Changes to foreign DGPS stations - - - - New foreign DGPS stations - - - - - - - - 18 - - - 18 - - - 19 - - - 22 - - 22 - - - 23 - - - 23 - - - 24 - - - 24 Miscellaneous documentation updates Using the N-S-E-W key - - - - - - 25 - - - - - - - - - - - - - 25 Using the power switch - - - - - - - - Adding "honk" to table - - - - - - - - Using the stop key - - - - - - - - - - Outputting waypoints displayed as numbers Recommended distances between antennas Mounting a loop antenna - - - - - - - Flush mounting the 941 - - - - - - - - Returning a 941 for service - - - - - - - - - - - 25 26 26 26 26 27 28 28 About this addendum Please read this addendum and keep it with your 941 documentation. This addendum contains all the update details necessary to properly operate your 941. This addendum describes several enhancements made to the 941's software versions 2.07, 2.10, 3.12, and 3.18. Accordingly, this addendum contains information that supersedes some parts of the existing 941 Reference Manual (part number GM1100, revision D). Because the current software is now version 3.18, all of the features described in "Software version 2.07 upgrades," "Software version 2.10 upgrades," and "Software version 3.12 upgrades" also apply to version 3.18. Contacting Northstar For service or sales information on this product, contact Northstar by email, fax, phone, or U.S. mail as follows: Table 1: Contacting Northstar Email: Service: service@northstarcmc.com Sales: sales@northstarcmc.com Fax: Service: 978/897-1595 Sales: 978/897-7241 Telephone: Main number: 978/897-6600 or 800/628-4487 U.S. mail: 30 Sudbury Road Acton, MA 01720 Website: www.northstargps.com (you can send email to Northstar directly from this site) ­1­ 032101 Addendum P/N GM210 Software version 2.07 upgrades This section describes several software enhancements made in upgrading the 941 software version 2.06 to software version 2.07. Please note that all of version 2.07's enhancements apply to each later software version, including versions 2.10, 3.12, and 3.18 as described later in this addendum. New NMEA output sentence Northstar has added a new sentence to its NMEA 0183 output format. The purpose of this new NMEA sentence, "MSS" (MSK Receiver Signal Status), is to provide status information for the beacon receiver's signals (the 941 sends a null sentence if the beacon receiver isn't installed). This status information includes beacon bit rate, frequency, signal-to-noise (SNR) ratio, and signal strength. For details about turning on this sentence, see page 118 of the 941 Reference Manual. There, you'll see a sample screen that displays the NMEA 0183 sentences; however, version 2.07 will display the additional MSS sentence in your unit's actual list. For further information about NMEA sentences, refer to the National Marine Electronic Association (NMEA) 0183 Specification. NMEA 1-Hz output Version 2.06 normally used the standard NMEA two-second interval for outputting NMEA sentences (a 0.5-Hz output rate). Version 2.07 lets you use one-second intervals, a rate of 1 Hz, under limited circumstances, for NMEA and diagnostic data output. NMEA output Using the 1-Hz output option, however, requires some thought when specifying either NMEA 0183 (NMEA version 2.0) or Raytheon (RAY 0183). Since there isn't enough time to transmit all available NMEA sentences within one second, you must select for output only those that are needed. If you select more ­2­ Addendum P/N GM210 032101 sentences than can be output in one second, the following error message is displayed: SORRY, CAN'T DO THAT. TOO MANY SENTENCES FOR 1 SEC INTERVAL If this message is displayed, you must select fewer sentences. Diagnostic output The RS-232 diagnostic port also may overflow--when it's configured to either COPY PORT1 or COPY PORT2, and one of the copied ports is in 0183 output mode--unless the diagnostic port's baud rate is fast enough to handle the number of characters. Because the diagnostic port's baud rate can now be changed, the 941 will always display this precautionary message before you actually reset the baud rate: WARNING: ALL SENTENCES MAY NOT TRANSMIT AT DIAG BAUD RATE. PRESS "ENTER" TO CONTINUE Uninstalled DGPS antenna In version 2.06, the 941 would display the error message DGPS NOT INSTALLED if the unit was powered on for a short time without the beacon antenna connected. The only way to clear the message was to turn power off, then turn power on again. In version 2.07, if you don't install the DGPS antenna before powering up the unit, the 941 displays the status message SEARCHING. As soon as you connect the antenna, the unit displays the message OK. You don't have to turn power off and on again. Updated beacon list Software version 2.07 contains an updated list of beacon names and their locations. ­3­ 032101 Addendum P/N GM210 Radio frequency interference (RFI) A change in the software timing has reduced or eliminated radio frequency interference that affected certain communications receivers. Software version 2.10 upgrades This section describes several software enhancements made in upgrading software version 2.07 to software version 2.10. Please note that all of version 2.10's enhancements apply to each later software version, including versions 3.12 and 3.18 as described later in this addendum. Anchor-watch alarm honk In the anchor-watch alarm function, you can set the 941 to honk, in addition to beep, as long as you've connected a honker with pin #14 on the interface connector. Once you set the anchorwatch alarm to honk, a continuous honking sequence begins when either your vessel moves outside the specified anchoralarm radius or if the navigation source (e.g., GPS) becomes unavailable. Note: On the ALARMS & BACKLIGHT screen, the ANCHOR ALARM field must be set to ON. To set the anchor-watch alarm to honk: 1. Press the STAR key once to display the ALARMS & BACKLIGHT screen. 2. Press the CURSOR PAD to highlight the HONK OUTPUT field, then press the EDIT ALARM menu key. 3. Press the CURSOR PAD to select ANCHOR ALM, then press the ENTER key. If your vessel moves outside the set anchor-alarm radius, for the next 10 seconds, the exclamation point begins flashing and the alarm automatically starts beeping (you'll only hear the beeping if you've set the ALARM AUDIO field to ON). The honk sequence then starts for a total of 3.5 minutes: 1 second of honking followed by 14 seconds of silence; 2 seconds of honking followed ­4­ Addendum P/N GM210 032101 by 13 seconds of silence; 3 seconds of honking followed by 12 seconds of silence, and so forth, until the honking is up to 14 seconds followed by 1 second of silence. This 3.5-minute honk cycle repeats forever unless you clear the anchor alarm. This honk does NOT automatically clear with the following conditions: · · · · your vessel moves back into the anchor-alarm radius you change the anchor-alarm radius you select a new "drop anchor" position you turn off the anchor alarm Instead, you must clear the anchor alarm in either of the following two ways. Option #1: 1. Press the STAR key once to display the ALARMS & BACKLIGHT screen, then press the CLEAR ALARM key. Option #2: 1. Press the STAR key once to display the ALARMS & BACKLIGHT screen. 2. Press the CURSOR PAD to highlight the HONK OUTPUT field, then press the EDIT ALARM key. 3. Press the CURSOR PAD to select either 200 PPNM or ALL ALARMS, instead of ANCHOR ALM, then press the ENTER key. Honking for all alarms Instead of only a beep for all alarms, you now can set all alarms to honk. This honking will start simultaneously with the flashing exclamation point on the ALARMS & BACKLIGHT screen. After you set all alarms to honk, the system emits an output sound for half a second, followed by silence for half a second. This repeatable honking sequence stops when the alarms either automatically clear or you manually clear them. Note: If you want all alarms to honk, you must set the ALARM AUDIO field to ON. ­5­ 032101 Addendum P/N GM210 To set all alarms to honk: 1. Press the STAR key to display the ALARMS & BACKLIGHT screen. 2. Press the CURSOR PAD to highlight the HONK OUTPUT field, then press the EDIT ALARM menu key. 3. Press the CURSOR PAD to select ALL ALARMS, then press the ENTER key. Table 2 below illustrates how to set the anchor-watch alarm and all other alarms to the desired audio. Table 2: Beep and honk settings for all 941 alarms Sound Beep Type All alarms Setting(s) Set alarm audio field to ON Description The standard 941 alarm beep (has not changed). Beep Anchor watch Set alarm audio field to ON Set anchor alarm field to ON Set alarm audio field to ON Set honk output field to ALL ALARMS The standard 941 alarm beep (has not changed). Honk All alarms Exclamation point flashes on the ALARMS & BACKLIGHT screen; simultaneously emits an output sound for half a second, followed by silence for half a second. For 10 seconds, the exclamation point flashes on the ALARMS & BACKLIGHT screen and the alarm beeps (if alarm audio is on), then the honk sequence starts (see "Anchor watch alarm honk" described on page 4 of this addendum). Honk Anchor watch Set anchor alarm field to ON Set honk output field to ANCHOR ALM ­6­ Addendum P/N GM210 032101 Selecting an independent NMEA output-port datum In all past software versions, the geodetic datum you set for the output ports was the same as the one for positional display. In software version 2.10 and later, you can adjust output position for NMEA 0183 ports 1 and 2 to specific geodetic datums, independently of the datum you choose for positional display. To select an NMEA output-port datum: 1. At the CHART screen, press the STAR key four times until you display the USER CUSTOMIZATION screen, then press the PORT SETUP OPTIONS key. 2. At the PORT SETUP OPTIONS screen, press either the PORT 1 SETUP menu key or the PORT 2 SETUP menu key. Both the PORT 1 SETUP and PORT 2 SETUP screens have a new field called OUTPUT DATUM. 3. Press the CURSOR PAD down to select the OUTPUT DATUM field, then press the EDIT menu key. 4. Press the CURSOR PAD up or down to select the desired datum. 5. To apply this chosen datum to your lat/lon coordinates in the NMEA 0183 output sentences, press the ENTER key (or press the CLEAR key to leave the option unchanged). Canadian tide stations Approximately 350 Canadian tide stations (using NOAA's US model and data) have been added to the 941's tide database. In total, 3540 tide stations are now stored in the 941. Changes to DGPS stations The DGPS station "Montauk Point" has been moved to "Moriches, NY." The name of the DGPS station "Port Aux Basques" has been changed to "Cape Ray" (Canada); its frequency and location is 288.0 kHz, 47 38N 59 14W. ­7­ 032101 Addendum P/N GM210 New DGPS stations The following new DGPS stations have been added: In Russia, these are "Baltijsk," "Shepelevskiy," "Set. Navolock," and "Dgedginsky." In Finland, "Outokumpu" and "Turku" have been added, and "Mantyluoto" and "Puumala" have been updated. In Estonia, "Ristna" has been added. New DGPS status message The DGPS status message TOO FEW SATELLITES is now being displayed on the DGPS STATUS screen. This message means there are too few satellites for a DGPS fix. Change to RMC sentence display Starting at 12:01 AM on January 1, 2000, the RMC sentence (defined as Recommended Minimum specific GPS/transit data sentence C), which displays the year using two digits, will display year as 00. Because all other NMEA 0183 sentences use four digits, they will display year as 2000. New TLL sentence Versions 2.10 and later now support the NMEA TLL sentence, sometimes referred to as the "rattle" sentence. This sentence allows the 941 to communicate its position to an interfaced radar device, which tracks a user-defined target. In turn, the interfaced radar device communicates to the 941 the target's position--in lat/lon coordinates--so that you can see the target symbol, displayed as a waypoint, right on the CHART screen (after you save the position). The target symbol is displayed with the name -RADAR on the CHART screen as well as on both the alpha and local waypoint lists (to access these lists, press the WAYPTS/ROUTES key, the WAYPT LIST key, and the NEXT LIST key until you reach the desired list). On the alpha and local lists, the -RADAR waypoint is displayed with the hours/minutes/seconds/day/month/year (for example, 12:50:20-30JUN95) in the description field. ­8­ Addendum P/N GM210 032101 In the 941 Reference Manual, please note that this TLL sentence should be added to Table 4, "NMEA 0183 Sentence Identifiers," on page 120. Changes to GGA output sentence "Age of differential correction" (in seconds) and "Beacon station ID" fields have been added to the NMEA 0183 output sentence GGA (GPS fix data). "Age of correction" is not available for 941 units containing the NAVCORE GPS 5-channel engine. Software version 3.12 upgrades This section describes several software enhancements made in upgrading software version 2.10 to software version 3.12. Please note that all of version 3.12's enhancements apply to each later software version, including version 3.18 as described later in this addendum. Sharing waypoints and routes The waypoint and route import/export feature allows two or more 941, 951, or 952 units to conveniently "share" all the same waypoints and routes. You can use the import/export function to move all of the waypoints and routes between Northstar units as follows: · · · · · · between two 951's between two 952's between two 941's between a 952 and a 951 between a 951 and a 941 between a 941 and a 952 ­9­ 032101 Addendum P/N GM210 NOTE: If you want to import or export to/from older units, these units all must have software version 3.12 or higher; to obtain any necessary upgrades, please contact your authorized Northstar dealer. Only one unit, designated the "master," enters the import/export function. The other unit can remain in normal operation as long as you don't actually add or modify its waypoints or routes during the transfer process. Any screen can be displayed during the transfer process, including the IMPORT DATA screen or the EXPORT DATA screen. You can designate either of the two units as the master because both units are able to import and export waypoints and routes; but once you select the master, make sure you select the correct function for what you want to do (import copies waypoints and routes into the master unit; export copies waypoints and routes from the master unit). Connecting the two units The two units must be properly connected using specific cables/ connectors and the aux-head ports. For interfacing information, contact your local Northstar dealer. Moving waypoints and routes into a master unit (import) When you move waypoints and routes into unit 1 (the designated master) from unit 2, the entire contents of unit 2 are imported into unit 1. Also, if any waypoint or route name matches exist, the waypoints or routes from unit 2 overwrite the waypoints or routes already in unit 1. ­ 10 ­ Addendum P/N GM210 032101 NOTE: If you press any function key on the master unit during the transfer, the error message TRANSFER ABORTED BY KEY HIT will be displayed, the process will be aborted, and the master unit will display the particular screen accessed by that function keypress. You can press any key on the other unit, however, without interrupting the transfer process. To purposely stop the transfer at any time, press the STOP key. If you press the STOP key, the master unit displays the dialog-box message TRANSFER ABORTED BY KEY HIT, and the status bar displays the message TRANSFER ABORTED. Waypoints and routes transferred up to that point are in the receiving unit (be aware that a particular route may not contain all of its waypoints due to the transfer interruption). Press the START key again to re-start the entire transfer process (this means that all waypoints and routes, not just the ones already in the receiving unit and the ones left to be transferred, are re-transferred). 1. Select the unit you'd like to use as the master. Remember: You can use either of the two units as the master because both units are capable of importing or exporting waypoints and routes. 2. At the master unit, press the WAYPTS/ROUTES key to display the WAYPTS AND ROUTES screen. ­ 11 ­ 032101 Addendum P/N GM210 3. Press the IMPORT/EXPORT menu key to display the IMPORT/EXPORT screen. 4. Press the IMPORT DATA menu key to display the IMPORT DATA screen. The status bar in the center of the screen displays the message READY TO TRANSFER to show that the transfer is ready to start. ­ 12 ­ Addendum P/N GM210 032101 5. Before transferring, check the communication link between the two units by pressing the TEST COMM key. The status bar should display the message REMOTE LINK OK. 6. To move waypoints and routes into this master unit from the other unit, press the START key. The status bar displays the message TRANSFERRING and updates every second with the number of waypoints and routes already received against the total quantity to be received. The progress bar, located below the status bar, graphically displays the percentage completed. If there's a problem with the transfer process, the following messages may appear: · If the other unit is off-line, the master unit displays the dialog-box message COULDN'T GET REMOTE WAYPT/ ROUTE COUNT and the status-bar message COMMUNICATION ERROR. · If the other unit doesn't contain any waypoints and routes, the master unit displays the dialog-box message NO WAYPTS OR ROUTES TO TRANSFER and the status-bar message NO TRANSFER DONE. (no more room available), the master unit displays the · If the master unit is completely full of waypoints and routes ­ 13 ­ 032101 Addendum P/N GM210 dialog-box message LOCAL UNIT STATUS ERROR [002] DATABASE FULL and the status-bar message COMMUNICATION ERROR. If there isn't any problem with the transfer process, the master unit's status bar displays the message TRANSFER COMPLETE when done. You can now press any key to resume other operations. Moving waypoints and routes from a master unit (export) When you move waypoints from unit 1 (the designated master) into unit 2, the entire contents of unit 1 are exported into unit 2. Also, if any waypoint or route name matches exist, the waypoints or routes from unit 1 will overwrite the waypoints or routes already in unit 2. NOTE: If you press any function key on the master unit during the transfer, the error message TRANSFER ABORTED BY KEY HIT will be displayed, the process will be aborted, and the master unit will display the particular screen accessed by that function keypress. You can press any key on the other unit, however, without interrupting the transfer process. To purposely stop the transfer at any time, press the STOP key. If you press the STOP key, the master unit displays the dialog-box message TRANSFER ABORTED BY KEY HIT, and the status bar displays the message TRANSFER ABORTED. Waypoints and routes transferred up to that point are in the receiving unit (be aware that a particular route may not contain all of its waypoints due to the transfer interruption). Press the START key again to re-start the entire transfer process (this means that all waypoints and routes, not just the ones already in the receiving unit and the ones left to be transferred, are re-transferred). 1. Select the unit you'd like to use as the "master." Remember: You can use either of two units as the master because both units are capable of importing or exporting waypoints and routes. ­ 14 ­ Addendum P/N GM210 032101 2. At the "master" unit, press the WAYPTS/ROUTES key to display the WAYPTS AND ROUTES screen. 3. Press the IMPORT/EXPORT menu key to display the IMPORT/EXPORT screen. 4. Press the EXPORT DATA menu key to display the EXPORT DATA screen. The status bar in the center of the screen ­ 15 ­ 032101 Addendum P/N GM210 displays the message READY TO TRANSFER to show that the transfer is ready to start. 5. Before transferring, check the communication link between the two units by pressing the TEST COMM key. If the status bar now displays the message REMOTE LINK OK, you may begin to transfer waypoints. 6. To move waypoints and routes from the master unit into the other unit, press the START key. The status bar displays the message TRANSFERRING and updates every second with the number of waypoints and routes sent compared to the total quantity to be sent. The progress bar, located below the status bar, graphically shows the percentage completed. If there's a problem with the transfer process, the following messages may appear: · If the other unit is off-line, the master unit displays the dialog-box message TRANSFER ABORTED BY COMMUNICATION TIMEOUT and the status-bar message COMMUNICATION ERROR. the master unit displays the dialog-box message NO WAYPTS OR ROUTES TO TRANSFER and the status-bar message NO TRANSFER DONE. · If the master unit doesn't contain any waypoints and routes, ­ 16 ­ Addendum P/N GM210 032101 · If the other unit is completely full of waypoints and routes (no more room available), the master unit displays the dialog-box message REMOTE UNIT STATUS ERROR [002] DATABASE FULL and the status-bar message TRANSFER ERROR. If there isn't any problem with the transfer process, the status bar displays the message TRANSFER COMPLETE when done. You can now press any key to resume other operations. Time display on the tide track screen On the TIDE TRACK screen, the solid vertical line and arrow is now positioned to show the tide level at the following times: · the time at the location of the selected tide station (see the hours displayed to the left of TID; in the sample screen below, about 4:00 AM Pacific Daylight Time) your local time (see the hours displayed to the left of the LCL; in the sample screen below, about 7:00 AM Eastern Daylight Time) · ­ 17 ­ 032101 Addendum P/N GM210 Software version 3.18 upgrades This section describes several software enhancements made in upgrading software version 3.12 to software version 3.18. WAAS differential capability The Northstar 941X uses a high-performance GPS receiver as its primary source of position data. Position, COG, and SOG are calculated directly from the received GPS satellites, along with the time, the date, and an estimate of the unit's accuracy. In contrast, the Northstar 941XD uses an internal differential receiver to obtain position corrections from Coast Guard radiobeacons. (The Coast Guard radiobeacon system consists of non-directional, short-range beacons installed at lighthouses and other coastal locations; their range is usually 10 to 175 nautical miles, and their corrections in most cases improve GPS position fixes to an accuracy of 1 to 3 meters.) With software version 3.18 and higher, however, the 941 can receive differential corrections to GPS signals from Wide Area Augmentation System (WAAS) satellites. As with Coast Guard radiobeacons, WAAS satellites use surveyed reference stations to monitor GPS signals from each visible satellite, determine if errors exist, and develop corrections. However, unlike Coast Guard radiobeacons or other land-based transmitters on other frequencies, WAAS uses a network of geostationary communication satellite transponders, which remain in fixed positions at approximately twice the distance from the earth's surface as the orbiting GPS satellites, and transmit on the same frequency as GPS. These satellite-based transmissions provide consistent position corrections over a much greater contiguous geographical area than the radiobeacons. WAAS differential corrections maintain a position accuracy of better than 3 meters 2dRMS, without the signal interference problems periodically experienced with lowfrequency, shore-based radiobeacon differential signals. With software version 3.18 and higher, the 941 will be able to receive WAAS differential corrections by interfacing it to the external Northstar 2201 WAAS Pod. Available in the future, the ­ 18 ­ Addendum P/N GM210 032101 Northstar 2201 is a self-contained, high-performance GPS antenna/engine that also receives WAAS differential correction signals. The 2201 will ship with a complete installation manual. NOTE: There is no WAAS capability for 941 units containing the NAVCORE GPS 5-channel engine. New WAAS options WAAS capability adds several new options to the 941, including the following (for details, see the respective sections below): · · · · WAAS and AUTO options for differential operations WAAS or W indicator on several 941 screens Hexagonal WAAS satellite designators on GPS SATS screen Remote power-on of the Northstar 2201 WAAS Pod (future) WAAS and AUTO options On the RECEIVER OPTIONS screen, the former DGPS OPERATION field is now called DIFFERENTIAL OPERATIONS. This field formerly supplied only two options, "ON" and "OFF," but now provides two more options, WAAS and AUTO, to accommodate WAAS capability: · · WAAS (new) - to use WAAS differential corrections. AUTO (new) - to use WAAS differential corrections preferentially; that is, the 941 will automatically switch to radiobeacon differential corrections if WAAS becomes unavailable and if the 941 contains an internal beacon receiver or is connected to an external one. DISABLED (the former "OFF") - to use no differential corrections. RADIOBEACON (the former "ON") - to use radiobeacon differential signals if the unit has an internal beacon receiver or is connected to an external one. · · ­ 19 ­ 032101 Addendum P/N GM210 WAAS indicator on existing screens When the 941 is receiving WAAS signals, the indicators WAAS or W will appear in the upper right-hand corner of certain screens, indicating that WAAS signals are being received and that the information on those screens relates to WAAS. These screens include: · · · · · · · · GPS POSITION screen PLOT screen PHANTOM LORAN screen NEW WAYPT screen EDIT WAYPT screen QUICK WAYPT screen STEERING screen 3D STEER screen NOTE: If your 941 is receiving its differential corrections from a beacon receiver, not the external 2201, the indicator in the upper righthand corner will be DGPS or D. ­ 20 ­ Addendum P/N GM210 032101 WAAS designators on GPS SATS screen On the GPS SATS screen, circles indicate GPS satellites, and hexagons have now been added to indicate the WAAS satellites. GPS satellite number WAAS satellite number Remote power-on of the Northstar 2201 Software version 3.18 features a remote power-on option that automatically switches on an external Northstar 2201 (available in the future) after it has been connected to the 941. To set the remote power option: 1. Press the STAR key to display the ALARMS & BACKLIGHT screen. Press the CURSOR PAD to highlight the HONK OUTPUT field, then press the EDIT ALARM menu key. 2. Press the CURSOR PAD to select REMOTE PWR, then press the ENTER key. 3. Press the STAR key to display the USER CUSTOMIZATION screen, then press the PORT SETUP OPTIONS menu key to display the PORT SETUP OPTIONS screen. 4. Press the CURSOR PAD to highlight the RS232 SETUP option, then press the EDIT menu key. Select EXTERN GPS, then press the ENTER key. ­ 21 ­ 032101 Addendum P/N GM210 5. Press the CURSOR PAD to highlight the BAUD RATE option, then press the EDIT menu key. Select 9600, then press the ENTER key. 6. Press the STAR key to display the RECEIVER OPTIONS screen. Press the CURSOR PAD to highlight the DIFFERENTIAL OPERATIONS field, then select, if not already set, WAAS or AUTO, and press the ENTER key. If the 941 displays the message COMM FAIL, press the PWR key to turn the unit off, then turn it back on again. Using demo mode to simulate WAAS You can simulate the use of WAAS in demo mode. To enable demo mode, follow the instructions on page 82 of the Northstar 941X Reference Manual, Rev. D (part number GM1100). Once the unit is in demo mode, press the STAR key to display the RECEIVER OPTIONS screen, then highlight the DIFFERENTIAL OPERATIONS field, then select the WAAS option and press the ENTER key. You'll now see the WAAS indicator on certain screens. Viewing distance-to-go on the NAVLOG screen The NAVLOG screen now shows the distance from your current location to the end of your trip, calculated from the number of remaining legs and the length of each leg. The distance-to-go (DTG) is given in nautical miles, kilometers, or statute miles, depending on the distance/speed units you select on the DISPLAY OPTIONS screen. ­ 22 ­ Addendum P/N GM210 032101 When you press the STOP menu key on the NAV LOG screen, the system stops navigating, and the distance-to-go is no longer displayed. When you press the RESTART menu key to resume navigating, the distance-to-go is displayed. Changes to U.S. DPGS stations · · The longitude of "Omaha, NE" has changed from 09554W to 09556W. The latitude of "Penobscot, ME" has changed from 4433N to 4427N, of "Vandenberg AFB" from 3442N to 3405N, and of "Whitney, NE" from 4344N to 4244N. "Ford Macon" was replaced by "New Bern, NC" at 294 KhZ / 100 bps, 35 10.86N 077 03.00W. The frequency of "Hartsville, TN" was corrected from 295 KhZ to 317 KhZ. · · New U.S. DGPS stations The following new U.S. DGPS stations have been added: · "Billings, MT" at 313 KhZ / 100 bps, 45 58.33N 107 59.78W ­ 23 ­ 032101 Addendum P/N GM210 · · "Hudson Falls, NY" at 324 KhZ / 200 bps, 43 16.21N 073 32.34W "Flagstaff, AZ" at 319 kHZ /100 bps, 35 13.18N 111 49.06W Changes to foreign DGPS stations · · · The location of "Finland/Outokumpu" has changed from 62 41N 029 01E to 62 41N 026 01E. The location of "Canadian/Cape Ray has changed from 47 34N 059 14W to 47 34N 059 09W. The frequency of "Canada/Cape Race" has changed from 288.0 KhZ to 315 KhZ and its location has changed from 47 038N 059 14W to 046 45N 053 10W. The location of "Canada/Richmond" has changed from 49 11W 123 07W to 49 19W 123 15W. The location of "France/Cape Bear" has changed from 42 1N 003 08E to 42 31N 003 08E. The frequency of "Russia/Shepelevskiy" has changed from 198.5 to 299.5 KhZ. The frequency of "Denmark/Skagen" has changed from 2980 to 2985. · · · · The following Canadian stations have been deleted: "Point Atkinson," "Race Rocks," "Triple Island," and "Point Petre." New foreign DGPS stations The following foreign DGPS stations have been added: · In Canada, these are "Bassano, AB" at 325.0 KhZ/200 bps, 50 24N 112 27W; "Watrous, SK" at 321.0 KhZ/200 bps, 51 40N 105 26W; and "Winnebeg, MB" at 312.0 KhZ/200 bps, 49 50N 097 30W. In the United Kingdom, "Tory Island" at 313.5 KhZ/100 bps, 55 16N 008 15W has been added. In Germany, "Helogland" at 313.0 Khz/200 bps, 54 11N 007 53E has been added. In Australia, "Weipa" at 316 KhZ/200 bps, 12 39S 141 51E has been added. ­ 24 ­ · · · Addendum P/N GM210 032101 Miscellaneous documentation updates This section describes other important changes and additions to the current 941 Reference Manual (part number GM1100, revision D). Using the N-S-E-W key When creating or editing waypoints, the 941 displays a screen containing a N-S-E-W key; however, this key isn't described in the current 941 Reference Manual. Here's how it works: If you've travelled to a part of the world that's south of the Equator or east of the Prime Meridian (running through Greenwich, England), the 941 automatically displays your lat/lon coordinates as "S" or "E," respectively, instead of "N" and "W." The N-S-E-W key lets you manually change these hemispheric values should it be necessary. When the cursor is flashing anywhere in the lat or lon fields, press the N-S-E-W key to change the hemispheric values. Using the power switch Turning the unit on Page 14 of the 941 Reference Manual reads, "Press the POWER switch briefly to turn on the 941X." This is correct. If you press and hold the power switch for more than two seconds, however, you'll actually shut the unit off. A brief press of the switch is all that's necessary to power-on the unit. Turning the unit off Page 14 of the 941 Reference Manual reads, "To turn the 941X off, press the POWER switch and hold it for at least one full second until the unit turns off." This is incorrect. Pressing the switch for only one second will not turn the unit off. You must press and hold the POWER switch for at least two full seconds or more until the unit turns off. ­ 25 ­ 032101 Addendum P/N GM210 Adding "honk" to table On page 114 of the 941 Reference Manual, in Table 2, "Interface Connector Pins," add "honk" in the description field for "200 PPNM OUT" at the bottom of the table. Using the stop key In the 941 Reference Manual, the function of the STOP key isn't explained on page 65 under the heading "Changing your trip." This menu key is displayed on the NAV LOG screen after pressing the NAV LOG key. Upon pressing the STOP key, the system stops navigating, and distances to waypoints, bearing to waypoints, and ETA or ETE are no longer displayed. For the 941 to copy waypoints into its nav log and display their navigation information (re-enabling the nav log function), you must go to a newly designated waypoint(s). Outputting waypoints displayed as numbers If you're changing the display of output waypoints from names to numbers as described in the 941 Reference Manual, "NMEA 0183 waypoint ID as" on page 122, be aware that there isn't any standard for identifying how numbers should be assigned when converting waypoints from names to numbers. When you export waypoint information as numbers to a peripheral device, be aware that numbers aren't sequentially defined and may be reused on a random basis. Recommended distances between antennas To avoid mutual interferences among different antennas on the vessel, refer to the recommended separation distances illustrated in the figure below, which shows the minimum recommended distances for the separation of the GPS antenna from other antennas and physical mounting surfaces. Under normal circumstances, following these guidelines usually results in a relatively trouble-free installation; however, the installer may want to adjust these distances, depending on the particular equipment and how it's configured. Because each installation is unique--according to the wishes of the customer--this ­ 26 ­ Addendum P/N GM210 032101 information should be used only as a guideline. It isn't absolute in determining the best location for every possible equipment configuration. Figure 1: Separation distances between antennas NOTE: Be especially careful about the distance between the combo antenna and any sources of magnetic interference (for example, the INMARSAT antenna). Mounting a loop antenna Mounting a loop-type antenna in close proximity to a radome (radar-set antenna) can degrade signals or cause a complete loss of the beacon signal. The klystron or magnetron contained in the radar antenna produces a very dense magnetic field, whether or not the radar set is turned on. These magnetic field effects are also present during the operation of the servo motors located on gyro-stabilized TV or INMARSAT communications dish platforms. Signal-degradation checks should be performed before finalizing the installation. ­ 27 ­ 032101 Addendum P/N GM210 Flush mounting the 941 When flush-mounting the unit, be sure to mount it on a flat surface. Mounting on a curved surface can distort or break the plastic and cause a breech in the waterproof seal. Do not overtighten as case damage may occur and waterproof integrity may be compromised. This will void the warranty due to physical damage. Returning a 941 for service Before returning a 941 to Northstar for repair, you must contact either your dealer or Northstar for instructions and a Returned Materials Authorization (RMA) number: If you purchased your unit through a dealer, call your dealer for an RMA number; if you don't have a dealer, call the Northstar Service Department for an RMA number. Shipments without a proper RMA number will not be accepted. ­ 28 ­ Addendum P/N GM210 032101 NOTES NOTES NOTES NOTES NOTES NOTES