Explorer 721US / 721EU Explorer 725US / 725EU VHF Marine Radio Operation and Installation Manual www.northstarnav.
IMPORTANT SAFETY INFORMATION Please read carefully before installation and use. This is the safety alert symbol. It is used to alert you to potential personal injury hazards, Obey all safety messages that follow this symbol to avoid possible injury or death. WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury CAUTION indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Contents Section 1 - General Information ................................................................................................................6 1-1 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1-2 Customize your Northstar VHF Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-5 Response to Individual Calls (INDIV REPLY) (US only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 ATIS MMSI & ATIS Functionality (EU only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 DSC Functionality (DSC FUNC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 7 - Install the Explorer 721/725 . .................................................................................................. 57 7-1 Installation Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Location Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 1 - General Information 1-1 Features Congratulations on your purchase of a Northstar VHF Explorer 721/725US or 721/725EU marine band radio.
1-2 Customize your Northstar VHF Radio You can customize the radio to suit your individual preferences. Some preferences can be set directly through the keys as explained in this Section. Other preferences are set up through the built-in menus and these are explained in the other Sections. 1-3 How to Display and Navigate Menus 1. Hold down CALL/MENU to show the RADIO menu or 2. Press CALL/MENU to show the DSC CALL menu. 3. Only four menu items can be displayed at any one time on the LCD.
1-5 LCD Symbols and Meanings The simulation shows the locations of all the following information symbols on the LCD displays. Base unit display Optional handset display These symbols may not appear at all or may be shown in a different location on the optional handset. Symbol Meaning TX Transmitting. HI LO Transmission power. High (HI) 25 W or Low (LO) 1 W. WX Weather channel. WX ALT Weather Alert. Alarm beeps will sound. 721/725 US only. BUSY Receiver busy with an incoming signal.
Happy Fish symbol with one to four indicator bars to show the probability of good fishing at your current location, based upon barometric pressure and air temperature. Four bars show that good fishing is likely. High pressure trends are associated with stable conditions and calm seas. Research indicates that best fishing occurs when barometric pressure is rising and between 1010 and 1022 mb. During these opportune conditions, most fish are thought to feed anywhere within the water column.
1-6 How the Microphone and 701 Optional Handset Work Together Consult the 721/701 Quick Start Guide for additional operational instructions. If you have the optional 701 handset installed on your VHF721: • neither item will transmit while both are ON hook, but you can hear the audio from the handset speaker and adjust the handset volume. • to use one item when it’s OFF hook, the other item must be ON hook. • if both items are OFF hook, only the microphone works.
3 CH Three Favorite Channels. Press to toggle between your favorite channels. The CH1, CH2, or CH3 symbol appears on the LCD to show which favorite channel is selected. To scan only one of your favorite channels, press 3CH then immediately press and release SCAN. If you want to scan all three favorite channels, press 3CH then immediately press and hold SCAN. To add a favorite channel for the first time, select that channel then hold 3CH to store it in the CH1 location.
Rotary knob Channel Select. Turn to select a channel. The current channel is shown on the LCD in BIG digits with an A or B designator suffix (if applicable) in small letters below the channel number. (See Appendix C for a listing of channel frequencies.) Push to activate the ENT (Enter) function. You can also use the rotary knob for alphanumeric entry if you don’t have an alphanumeric microphone. Turn to step through alphanumeric characters one at a time then push to confirm each selection.
Section 2 - The Radio Menu (MENU) Hold down CALL/MENU to show the radio MENU options. Sections 1-3 and 1-4 explain how to navigate around the menu and enter, save and change data. 2-1 The Radio Menu Options (MENU) Show weather, SNR or Happy Fish information on the handset. INFO DATA See Section 2-2. (Handset only) BUDDY LIST LOCAL/DIST BACKLIGHT CONTRAST Maintain your buddy list. Set radio sensitivity. See Section 2-3. See Section 2-4. Set backlight level. Set contrast level. See Section 2-5.
2-2 Show Weather, SNR or Happy Fish on Handset (INFO DATA) If you have the optional handset installed, you can use INFO DATA to show the local weather forecast (e.g. SUNNY) and a digital readout of the current barometric pressure (mb or in-Hg) and the channel name on the handset LCD. MENU SELECT >INFO DATA BUDDY LIST LOCAL/DIST INFO DATA >ON OFF DISTRESS A BIT CLOUDY 78.4°F 29.
2-3 Maintain Your Buddy List (BUDDY LIST) MENU SELECT >BUDDY LIST LOCAL/DIST BACKLIGHT Use the Buddy List to store the names and associated MMSI’s of 20 favorite people. Names are stored in the order of entry, with the most recent entry shown first. The following sections show to use BUDDY LIST to add, edit, and delete entries in your buddy list. Section 3 explains how to call a buddy.
2-3-3 Delete an Entry BUDDY LIST > MANUAL NEW ALEX TOM BUDDY LIST > MANUAL NEW ALEX TOM TOM > EDIT DELETE DELETE BUDDY TOM > YES NO 1. Select BUDDY LIST. Press ENT or push the rotary knob to display the list of entries. 2. Scroll down (if required) to the entry you want to delete and press ENT. 3. Select DELETE then select YES. 4. The entry is deleted immediately and the buddy list is displayed again.
2-5-1 Set the Backlighting Level BACKLIGHT LO HI PRESS ENT 1. Select BACKLIGHT. 2. Use CH + or CH - to select a comfortable backlight level. 3. Press ENT or push the rotary knob to confirm the new level and return to the menu. Note: 705 handset option is only on or off. 2-5-2 Set the Contrast Level CONTRAST LO HI PRESS ENT 1. Select CONTRAST. 2. Use CH + or CH - to select a comfortable contrast level. 3. Press ENT or push the rotary knob to confirm the new level and return to the menu.
2-6-2 Local Time (TIME OFFSET) The local time can be set by entering the time offset between UTC and local time as follows. GPS/DATA MANUAL >SETTING SETTING > TIME OFFSET TIME FORMAT TIME DISPLY TIME OFFSET >+01:30 02:30PM LOC 1. Select GPS/DATA, then SETTING. 2. Select TIME OFFSET to enter the difference between UTC and local time. Half hour increments can be used with a maximum offset of ±13 hours. In this example, a difference of +1.
2-6-3 Time Format Options (TIME FORMAT) Time can be shown in 12 or 24 hour format. GPS/DATA MANUAL > SETTING SETTING TIME OFFSET > TIME FORMAT TIME DISPLAY TIME FORMAT > 12 Hr 24 Hr 07:15AM LOC 1. Select GPS/DATA, then SETTING. 2. Select TIME FORMAT. 3. Select 12 Hr or 24 Hr as desired. In this example, 12 hour format has been selected so the LCD shows the AM or PM suffix.
2-6-7 GPS Alert Options (ALERT) The GPS alert is usually set to ON so that if the GPS navigation receiver is disconnected, the alarm sounds. SETTING LL DISPLY COG/SOG > GPS ALERT GPS ALERT > ON OFF 1. Select GPS/DATA, then SETTING. 2. Select GPS ALERT. 3. Select ON or OFF as desired. 2-7 GPS Simulator (GPS SIM) The GPS Simulator is set to OFF whenever the radio is turned ON or whenever real GPS data is available through the COM port.
2-9 Subscribe or Un-Subscribe the 705 handset (HS SETTING) Explorer725EU/725US only The optional Handset functions with the base unit. It can not operate on it’s own. Ensure the base unit is turned ON when using the handset. You can use the VHF705 wireless handset to control and communicate with Explorer725 base unit from almost anywhere aboard your vessel. Before you first use the handset, it must first be subscribed to the base unit. Subscribing the 705 Handset to the 725 base unit: 1.
Section 3 - Radio Setup Menu (RADIO SETUP) Hold down CALL/MENU then scroll down and select RADIO SETUP. Press ENT or push the rotary knob to show the RADIO SETUP menu options. Sections 1-3 and 1-4 explain how to navigate around the menu and enter, save and change data. 3-1 The Radio Setup Menu Options (RADIO SETUP) UIC Select the channel bank (US only). See Section 3-2. CH NAME Edit or delete channel names. See Section 3-3. RING VOLUME Set the volume level of the incoming call notification beeps.
3-3 Change Channel Names (CH NAME) The channel charts are listed in Appendix C with their default name tags. CH NAME gives you the option to edit or delete the channel name tags displayed on the screen. RADIO SETUP > CH NAME RING VOLUME KEY BEEP EDIT CH NAME TELEPHONE CH NAME TELEPHONE 02 TELEPHONE > EDIT DELETE SAVE CH NAME PHONE1 > YES NO 1. Select RADIO SETUP, then CH NAME. 2.
3-6 Set the Priority Channel (WATCH MODE) If you have the 721/725 EU, watch mode is similar to a dual watch, scanning between the priority channel and the working channel. CH16 is the priority channel. If you have the 721/725 US and are operating on USA or Canadian channel banks, you can set the priority channel to cover both CH16 and CH09 as well as the working channel, as follows: RADIO SETUP KEY BEEP INT SPEAKER > WATCH MODE WATCH MODE > ONLY 16CH 16CH+9CH 1. Select RADIO SETUP, then WATCH MODE. 2.
3-8-2 NMEA GPS data source (GPS SOURCE) RADIO SETUP WATCH MODE WX ALERT > COM PORT COM PORT NMEA > GPS SOURCE BARO & TEMP NMEA CHECKSUM > ON OFF GPS SOURCE > NMEA NAVBUS GPS SOURCE NMEA > ON OFF 1. Select RADIO SETUP, then COM PORT. 2. Select GPS source, then select NMEA. 3. The cursor is at ON. Press ENT or push the rotary knob to confirm the setting and show the CHECKSUM option. 4. CHECKSUM ON is the usual setting. The cursor is at ON.
Information regarding Barometer, Weather and Happy Fish operation: For these functions to operate correctly, the barometer sensor built into the microphone requires a permanent power connection. When the radio is turned off with the power knob on the radio, power continues to flow to the barometer sensor. This enables a 24 hour barometer trend to be collected and is used with the Happy Fish and Weather predictor. Notes: • Barometric data is maintained even if the radio is switched off (via the power knob).
1. 2. Select RADIO SETUP, then BARO SENSOR. Select BARO CAL. then change the setting to match the reading on an accurate instrument nearby or the reading given by a local weather station. 3-10 Temperature Display (TEMPERATURE) A temperature sensor in the base unit microphone measures air temperature changes. NOTE: Temperature units can be displayed on the Optional Handset (701/705). 3-10-1 Set the Temperature Units (UNITS) RADIO SETUP COM PORT BARO SENSOR > TEMPERATURE 1. 2. 3.
Section 4 - DSC SETUP Menu WARNING A valid USER MMSI must be entered into this radio before these DSC functions can be used. See Appendix E - Enter Your USER MMSI (USER MMSI). 4-1 What is DSC? DSC (Digital Selective Calling) is a semi-automated method of establishing VHF, MF, and HF radio calls. It has been designated as an international standard by the IMO (International Maritime Organization) and is part of the GMDSS (Global Maritime Distress and Safety System).
4-4-1 Create a Group (GROUP SETUP) 1. Select DSC SETUP, then GROUP SETUP. 2. If this is the FIRST TIME that you’re entering a group name, a line of nine zeros appears. Otherwise, any existing group names are displayed. Press ENT or push the rotary knob to display the input screen. 3. Enter the group name along the dashed line. The group name can be alphanumeric. Press ENT or push the rotary knob to confirm each correct entry and to move to the next digit.
4-5 Response to Individual Calls (INDIV REPLY) (US only) You can respond to incoming individual calls with an automatic response or with a manual response. • An automatic response sends an acknowledgement then sets the request link channel, ready for a conversation. • A manual response asks if you want to acknowledge the call, and then asks if you want to converse with the caller. DSC SETUP USER MMSI GROUP SETUP > INDIV REPLY INDIV REPLY > AUTO MANUAL 1. Select DSC SETUP, then select INDIV REPLY. 2.
4-6-2 Enable ATIS Functionality (ATIS FUNC) (EU only) ATIS functionality will operate only after the ATIS MMSI has been entered (see previous section). DSC SETUP GROUP SETUP ATIS MMSI > ATIS FUNC ATIS FUNC > ON OFF 1. Select DSC SETUP, then ATIS FUNC. 2. The cursor is at ON. Select ENT or push the rotary knob to enable the ATIS functionality and automatically disable DSC functionality. The ATIS annunciator appears on the screen. It’s not possible to have both ATIS ON and DSC ON simultaneously.
Section 5 - Send and Receive DSC Calls WARNING A valid USER MMSI must be entered into this radio before these DSC functions can be used. See Appendix E - Enter Your USER MMSI (USER MMSI). 5-1 The DSC CALL Menu Options Press CALL/MENU to show the DSC CALL menu. Press ENT or push the rotary knob to show the following DSC CALL menu options. Sections 1.3 and 1.4 explain how to navigate around the menu and enter, save and change data. DSC CALL INDIVIDUAL > LAST CALL GROUP 1.
5-2 Call an Individual (INDIVIDUAL) INDIVIDUAL > ROUTINE SAFETY URGENCY ROUTINE > MANUAL NEW BUDDY1 BUDDY2 MANUAL MMSI 0–––––––– 112345678 INDIVIDUAL ROUTINE > SET CHANNEL 112345678 INDIVIDUAL ROUTINE > SEND? 112345678 INDIVIDUAL ROUTINE CALLING... 112345678 INDIVIDUAL ROUTINE WAITING ACK INDIV ACK 112345678 PRESS PTT ESC –> EXIT You can call anyone who has a radio with DSC functionality. You can set the priority level of the DSC call to routine, safety or urgency.
5-2-2 Acknowledge an Individual Incoming Call RCV: INDIV 523456789 ROUTINE ENT –> ACK Alternating 13 CHANNEL REQUEST ESC –> EXIT The Explorer 721/725 EU requires the operator to manually send an acknowledgement to the requesting radio. Press ENT or push the rotary knob to send an acknowledgement or press ESC to cancel. The Explorer 721/725 US automatically sends an acknowledgement to the requesting radio within 10 seconds of receiving the call.
2. The priority is set automatically to URGENCY. but you can change the priority level of the DSC call to routine, safety, urgency, or distress. Choose: • URGENCY only when a serious situation or problem that could lead to a distress situation • SAFETY to send safety information to all other vessels in range • ROUTINE to make a routine call to all vessels (US only) 3. Select the working channel and press ENT or press the rotary knob.
DSC CALL ALL SHIPS CALL LOG > DIST LOG DISTRESS 10:03 UTC 82º50.123 N 27º45.456 W 987654321 INDIVIDUAL ROUTINE > SET CHANNEL 987654321 INDIVIDUAL ROUTINE > SEND? 02 987654321 DISTRESS PIRACY ALL RELAY 987654321 > CALL BACK DELETE SAVE MMSI SAM LL REQUEST > SEND? SAM LL REQUEST 5-8 Request the LL Position of a Buddy (LL REQUEST) DSC CALL CALL LOG DIST LOG > LL REQUEST LL REQUEST > SAM VHF721 BUDDY #3 CALLING... Channel name SAM LL REQUEST WAITING ACK 1.
5-9-1 Select your Buddy TRACK BUDDY START TRACK > SET BUDDY TRACKLIST DSC CALL DIST LOG LL REQUEST > TRACK BUDDY SET BUDDY > BUDDY1 OFF BUDDY2 ON BUDDY3 OFF SET BUDDY BUDDY1 > ON OFF 1. Press CALL/MENU to enter the DSC CALL menu, then select TRACK BUDDY. 2. Select SET BUDDY then select the buddy you want to track. You can set a maximum of 3 buddies to track. 3. Select ON to track that buddy or OFF to not track that buddy, and press ENT or push the rotary knob to confirm.
5-9-4 Track Your Buddy (TRACK BUDDY) ADD Add or Delete a Buddy as follows: DSC CALL DIST LOG LL REQUEST > TRACK BUDDY TRACK BUDDY START TRACK SET BUDDY > TRACKLIST TRACKLIST > ADD NEW BUDDY1 BUDDY2 ADD NEW > BUDDY3 BUDDY2 ADD NEW > ADD NEW BUDDY3 BUDDY2 1. Press CALL/MENT to enter the DSC CALL menu, then select TRACK BUDDY. 2. Select TRACK LIST, Any buddies already on the track list will be listed.
The 721/725 US responds automatically but the 721/725 EU prompts you to press ENT or push the rotary knob to acknowledge the incoming call. The caller should respond to your acknowledgement by making voice contact on the designated channel. If this doesn’t happen, you can press PTT to initiate voice contact instead. The call data is stored in the Call Log (see Section 5-7). 5-12 Receive a Group Call (RCV: GROUP) When you receive notification of a GROUP call, press any key to cancel the alert.
Section 6 - Distress Calls WARNING A valid USER MMSI must be entered into this radio before these DSC functions can be used. See Appendix E - Enter Your USER MMSI (USER MMSI). 6-1 Send a Distress Call 1. Open the red cover labelled DISTRESS. If time is available to specify the nature of the distress, go to step 2. Otherwise, go directly to step 3. DISTRESS CALL > ABANDONING PIRACY OVER BOARD 2. DISTRESS CALL > PIRACY HOLD DISTRESS 2 SECONDS.. DISTRESS CALL SENT! WAIT.. PRESS ESC TO CANCEL...
6-3 Receive a Distress Call (RCV: DISTRESS) 123456789 DISTRESS FLOODING ESC –> EXIT An alert sounds when a distress call (DISTRESS!) is received. Press any key to cancel the alert. You don’t need to send an acknowledgement. 123456789 10:34 UTC 82º50.003'N 27º45.543'W The radio automatically selects CH16 and displays the details of the distress call on the screen. Press PTT to establish voice contact. The details are displayed over two screens that alternate every 1.
Appendix A - Technical Specifications Northstar Explorer 721/725US and 721/725EU GENERAL Power Supply: 13.6 V DC. Current drain: Transmit 6 A at 25 W Tx / 1.
Track Your Buddy: Yes Group Call: Yes Call logs: Yes - 20 individual and 10 distress Barometer, Temperature and Happy Fish: Yes Channel Naming: Yes Tri watch, favorite channel scan: Yes All scan: Yes User programmable MMSI: Yes (User MMSI and ATIS (721/725 EU) MMSI and NAME directory: Yes - 20 numbers & group TRANSMITTER Frequency: 156.025 - 157.
Appendix B - Troubleshooting 1. The transceiver will not power up. A fuse may have blown OR there is no voltage getting to the transceiver. a) Check the power cable for cuts, breaks, or squashed sections. b) After checking the wiring, replace the 7 Amp fuse (a spare fuse is supplied). c) Check the battery voltage. This must be greater than 10.5 V. 2. The transceiver blows the fuse when the power is switched on. The power wires may have been reversed.
Appendix C - VHF Marine Channel Charts C-1 International Channel Chart CH TX (MHz) RX (MHz) MODE 01 156.050 160.650 D 02 156.100 160.700 D 03 156.150 160.750 04 156.200 05 156.250 TRAFFIC TYPE SHIP TO SHIP SHIP TO SHORE NAME TAG Public Correspondence No Yes TELEPHONE Public Correspondence No Yes TELEPHONE D Public Correspondence No Yes TELEPHONE 160.800 D Port Operations No Yes PORT OP 160.850 D Port Operations, Selected VTS Areas No Yes PORT OPS/VTS 06 156.
62 156.125 160.725 D Port Operations No Yes PORT OPS 63 156.175 160.775 D Port Operations No Yes PORT OPS 64 156.225 160.825 D Public Correspondence No Yes TELEPHONE 65 156.275 160.875 D Port Operations No Yes PORT OPS 66 156.325 160.925 D Port Operations No Yes PORT OPS 67 156.375 156.375 S Commercial, bridge-to-bridge Yes No BRIDGE COM 68 156.425 156.425 S Boat Operations, Recreational Yes No SHIP - SHIP 69 156.475 156.
C-2 USA Channel Chart CH TX (MHz) RX (MHz) MODE TRAFFIC TYPE SHIP TO SHIP TO SHIP SHORE NAME TAG 01A 156.050 156.050 S Port Operations, Selected VTS Areas Yes Yes PORT OPS/VTS 03A 156.150 156.150 S US Government, Coast Guard Yes Yes UNAUTHORIZED 05A 156.250 156.250 S Port Operations, Selected VTS Areas Yes Yes PORT OPS/VTS 06 156.300 156.300 S Inter-ship Safety Yes No SAFETY 07A 156.350 156.350 S Commercial Yes Yes COMMERCIAL 08 156.400 156.
67 156.375 156.375 S Commercial, bridge-to-bridge, 1W with Yes Power-up No BRIDGE COM 68 156.425 156.425 S Boat Operations, Recreational Yes No SHIP - SHIP 69 156.475 156.475 S Boat Operations, Recreational Yes Yes PLEASURE 70 156.525 156.525 Digital Selective Calling - DSC ------ ------ DSC 71 156.575 156.575 S Boat Operations, Recreational Yes Yes PLEASURE 72 156.625 156.625 S Boat Operations, Recreational Yes No SHIP - SHIP 73 156.675 156.
C-3 CANADA Channel Chart CH TX (MHz) RX (MHz) MODE 01 156.050 160.650 D Public Correspondence No Yes TELEPHONE 02 156.100 160.700 D Public Correspondence No Yes TELEPHONE 03 156.150 160.750 D Public Correspondence No Yes TELEPHONE 04A 156.200 156.200 S Canadian Coast Guard, SAR Yes Yes CANADIAN CG 05A 156.250 156.250 S Port Operations, VTS in Selected Areas Yes Yes PORT OPS/VTS 06 156.300 156.300 S Inter-ship Safety Yes No SAFETY 07A 156.350 156.
62A 156.125 156.125 S Canadian Coast Guard Yes Yes CANADIAN CG 64 156.225 160.825 D Public Correspondence, Duplex No Yes TELEPHONE 64A 156.225 156.225 S U.S. Government, Canadian Commercial Yes Fishing Yes UNAUTHORIZED 65A 156.275 156.275 S Port Operations Yes Yes PORT OPS 66A 156.325 156.325 S Port Operations Yes Yes PORT OPS 67 156.375 156.375 S Commercial, SAR Yes No COMMERCIAL 68 156.425 156.
5 . The letter “A” illuminated by the channel number indicates the Canada channel is simplex. This same channel is always duplex when selecting International. There is no “A” reference for International channels. The letter “B” is only used for some Canadian “Receive only” channels. 6 . Channel 70 is designated for use exclusively for Digital Selective Calling (DSC), such as Distress, Safety, and Ship Calls. No voice communication is allowed on CH70.
Appendix D - EU Inland Waterway Channels Country Specific table For specific channel information for your country, please refer to local authorities. CH SPECIFIC FOOTNOTES TRANSMITTING FREQUENCY (MHz) SHIP 52 SHIP-TO-SHIP SHIP-TO PORT NAUTICAL INFORMATION LAND 60 a) 156.025 160.625 x 01 a) 156.05 160.65 x 61 a) 156.075 160.675 x 02 a) 156.1 160.7 x 62 a) 156.125 160.725 x 03 a) 156.15 160.75 x 63 a) 156.175 160.775 x 04 a) 156.2 160.8 x 64 a) 156.225 160.
76 j) d) o) 156.825 156.825 17 h) 156.85 156.85 77 a) k) 156.875 156.875 18 156.9 161.5 x 78 156.925 161.525 x 19 156.95 161.55 x 156.975 161.575 x 20 157 161.6 x 80 157.025 161.625 x 79 a) x x x 21 a) 157.05 161.65 x 81 a) 157.075 161.675 x 157.1 161.7 x 22 82 l) m) 157.125 161.725 x 23 m) 157.15 161.75 x 83 a) m) 157.175 161.775 x 24 m) 157.2 161.8 x 84 m) 157.225 161.825 x 25 m) 157.25 161.85 x 85 a) m) 157.275 161.
Explanation of specific footnotes in Country Specific table: a. In the countries mentioned under remark 2, it is strictly prohibited to use this channel. b. This channel is not allowed to be used between Rhine km 150 and km 350. c. In the Netherlands, this channel is used by for its on-scene communications during safety operations on the North Sea, IJsselmeer, Waddenzee, Ooster- and Westerschelde. d. This channel may also be used for piloting, mooring, tugging and for other nautical purposes. e.
D-1 Special Channels 2 CH SEND (MHz) RECEIVE (MHz) TRAFFIC TYPE SHIP TO SHIP SHIP TO SHORE NAME TAG 00 1 156.000 156.000 UK Coast Guard Users Yes Yes UK COAST GRD M1 157.425 157.850 UK Marina Channel M1 Yes Yes UK MARINA M2 161.425 161.425 UK Marina Channel M2 Yes Yes UK MARINA 31 157.550 162.150 INT’L, Duplex (Holland) No Yes NL MARINA 96H 162.425 162.425 INT’L (Belgium) No Yes BEL G MARINA L1 155.500 155.500 INT’L (Skandinavia) Yes No LEISURE 1 L2 155.
Appendix E - MMSI and License Information E-1 Obtain Your User MMSI number WARNING A valid USER MMSI must be entered into this radio before these DSC functions can be used. You can’t make any DSC transmissions until you’ve obtained a user MMSI and entered it into your Explorer 721 725. You must obtain a user MMSI (Marine Mobile Service Identity) and enter it into your radio in order to use the DSC functions, including Track Buddy.
Section 7 - Install the Explorer 721/725 7-1 Installation Options There are two ways to install the radio. You can choose: • a deck or overhead mounted gimbal installation. The reversible mounting gimbal is fixed to a suitable site and the radio is placed into it. The radio can be removed for storage and the viewing angle can be adjusted. • a recessed installation. The radio is recessed into a cavity cut into a bulkhead. The radio fixture is permanent and the viewing angle cannot be adjusted.
7-3 Checklist The following items should be supplied in the box. Check before starting the installation and contact your dealer if an item is missing. NOTE: An antenna is NOT provided. Consult your Northstar dealer for advice if necessary. 1. Mounting gimbal for the VHF radio 2. Power supply cable with in built 7 Amp fuse 14. Two spring washers for the microphone bulkhead mount 3. External speaker connection cable with white (+) wire and black (-) wire 15.
7-4 Gimbal Installation 1. Hold the mounting gimbal at the chosen location and use a soft pencil to mark the screw hole positions onto the mounting surface. 2. If you can’t reach behind the mounting surface to attach the nuts, use the self-tapping screws instead of the flat screws shown in the picture. If you’re drilling into fibreglass, use a drill bit smaller than 3/16” (5mm) to drill the pilot holes. Otherwise, drill the four screw holes where marked, using a 3/16” (5mm) drill bit.
5. Use the two short M5x10 screws to screw the mounting brackets to the sides of the radio. 6. Screw each M5x32 screw through the screw hole in the mounting bracket, then attach the stopper. If your bulkhead exceeds 0.51” (13mm), the stopper can be discarded if necessary. 7. Tighten the M5x32 screws until the radio is held firmly against the rear of the bulkhead. 7-7 Install the Microphone Bulkhead Mount 2. Drill the two pilot screw holes where marked. 3.
7-8 Connect the Radio Cables The connectors are on the rear of the base unit, as follows: 1. GPS and COM connector. For connection to GPS device via NMEA. Also includes NavBus wiring for Track Buddy and other features. See the following table for wiring and color codes. (If you’re not using this, be sure to put the protective cap securely over the connector to protect it from moisture and dust.) 2. Docking Cable connector (Explorer 721US/EU only) for optional Handset.
Wiring for GPS and COM connector (See 7-8, 1.
Northstar Explorer VHF Series: 721/725 Operation and Installation Manual M84 Northstar GPS product Handset docking cable Wallplate on bulkhead VHF721/725 Base unit with microphone Antenna connection cable VHF Antenna Optional 701 Handset Battery Fuse on RED power cable BLACK power cable External speaker connection cable External speaker 7-11 The Completed Installation (with Optional 701 Handset) 63
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