User manual NORTHSTAR M121

[. . . ] M121/M84 Multi-Function Unit Installation and Operation Manual www. northstarnav. com Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1-1 Overview . 8 2 Basic Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2-1 Using the keys . 14 3 Navigation: Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4 Video window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5 Navigation: Highway window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Available AIS vessels transmitting in the local area are shown on the chart when this feature is enabled. The following AIS receivers are supported by this unit: · Comar SLR200 (external GPS). · Weatherdock Two Channel AIS Receiver "EASY AIS", Part No. (see section 16-3) 16-1 Viewing AIS Vessels A typical AIS window shows: E B A C D A B C D E AIS Vessel Dangerous Vessel Projected Course Data Box Range Rings Northstar M121/M84 Installation and Operation Manual 57 When the cursor is placed over an AIS vessel for at least two seconds, a data box appears at the bottom of the window with information about the AIS vessel. For complete AIS information on the AIS vessel place the cursor over an AIS vessel for at least two seconds and press . Press either or to clear the information. 16-2 Dangerous Vessels The M121/M84 calculates the time of closest point of approach (TCPA) and closest point of approach (CPA) for each AIS vessel. If the TCPA and the CPA is below the trigger values then it will be considered dangerous. (See section 19-8 for setting the dangerous vessel alarm) A dangerous vessel is indicated on the chart by a red circle around the icon. TCPA 15 min CPA 0. 5 nm 16-3 AIS Windows To go to the AIS windows, press , select More, select AIS, then press or to select one of the two windows: Vessels or Safety msgs (rx). If there are more items than will fit on the window, press or to see the others. Vessels This is a sorted list of vessels currently being received by the AIS receiver. Once maximum is reached, vessels furthest away from the current location will be replaced. A vessel will be removed from the list if no information is received within 6 minutes from the last message. Displaying an AIS vessel on the chart 1 Press or to select a vessel. The Instrument switches to chart window, with the selected vessel position in the middle. 58 Northstar M121/M84 Installation and Operation Manual Displaying Full AIS Details 1 Press or to select a vessel. This window displays all information for the selected AIS vessel provided by the AIS receiver. Safety msgs (rx) Safety msgs (rx) are broadcasted messages received by the AIS receiver. This window displays the date and time of message received, MMSI of AIS vessel that broadcasted the message, and the message itself. The oldest message is replaced when the list is full. Sorting Vessels Press , select Sort and select one of the options. This sorts the list based on the chosen category. Northstar M121/M84 Installation and Operation Manual 59 17 DSC/Buddy track windows Buddy track requires an optional Northstar DSC VHF radio to be installed. Buddy track tracks other boats which have DSC radios connected to their GPS receivers by NavBus and are in VHF range. For information on setting up and using the VHF radio for buddy track, see the radio's operation manual. To go to the DSC windows, press DISPLAY , select More, then press or to select one of the three windows: Distress, Poll or Buddy track. If there are more items than will fit on the window, press or to see the others. 17-1 The windows Distress Boats that have sent DSC distress messages and their positions. Poll Boats you have manually polled on the VHF radio, and their position at that time. Buddy track Buddy boats from your DSC radio. The radio regularly calls the boats and updates their positions. When your DSC radio receives a distress message, the Instrument creates a distress waypoint at the boat position. Display to switch to Chart and display the position of the boat sending the distress message. Boat positions The boat positions on the Instrument can differ from the true boat positions: Distress: The position is the distress waypoint, which is where the boat was when it sent the distress message. Polled boats: The position is where the boat was when you last polled the boat. [. . . ] TTN - Time to the next position the M121/M84 is navigating to, either a waypoint or the cursor. User card - A plug-in card that stores waypoints, routes and tracks (see section 1-2). UTC - Universal Time Coordinated or Coordinated Universal Time, which is a standard world time, formerly called Greenwich Mean Time (GMT). Waypoint - A position that you can set on the Instrument chart, for example a fishing spot or a point on a route (see section 5). Weather - An estimate of the weather based on barometric pressure (requires Northstar 721 VHF radio). Northstar M121/M84 Installation and Operation Manual 109 Navigation data BRG Bearing to Destination: Bearing to the destination from the boat. [. . . ]