User manual JRC JMA-2344

[. . . ] Thank you very much for purchasing the JRC marine radar equipment, JMA-2343 and JMA-2344. This equipment is a marine radar equipment designed to obtain safe operation of marine ships. The equipment consists of a radar signal transceiver unit, a CRT display unit and a scanner unit as its main units. Before operating the equipment, be sure to read this instruction manual carefully for correct operation. [. . . ] 1 Displaying the ship's speed on the display unit When speed information is input to the display unit, the ship's speed is automatically displayed. In order to use this function, it is necessary to input ship's speed information from a navigation device. 2 Displaying the ship's heading on the display unit When ship's heading information is input to the display unit, the ship's heading is automatically displayed. In order to use this function, it is necessary to input ship's bearing information from a navigation device. This radar equipment is capable of inputting bearing information from the following two input connectors at the back of the display unit. Bearing information input from CMPS+ and CMPS- terminals of the EXT1(J3) connector Bearing information input from NAVRX and NAVCOM terminals of the GPS(J4) connector 200 Display of position information information (a) Select among "L/L", "TD", "CUR L/L", or "WPT L/L" in the line "POSITION" - the menu "DISPLAY". When displaying latitude/longitude When displaying LORAN C time difference When displaying L/L of the cursor : "L/L" : "TD" : "CUR L/L" : "WPT L/L" Erasing location information (b) Select "NO" in the line "POSITION" - the menu "DISPLAY". When "L/L" is selected, it is necessary to input the ship's position (latitude and longitude) information from a navigation device. When "TD" is selected, it is necessary to input the ship's position (LORAN C time difference) information is a navigation device. When "CUR L/L" is selected, it is necessary to input the ship's position (latitude and longitude) information from a navigation device. When WPT "L/L" is selected, it is necessary to input the waypoint's position (latitude and longitude) information from a navigation device. In order to use this function, it is necessary to input of the following information to the display unit: Information on the bearing of the waypoint Information on the distance to the waypoint Information on the ship's speed. The bearing, distance and required travel time (when ship speed information has been input) will be displayed. ⷠThe route from the ship to the waypoint will be displayed with the following marker. The waypoint mark, the bearing, distance and required travel time to the waypoint will disappear. In order to maintain the information that has been set, the battery (BT1) needs to be replaced at regular intervals. Please call the dealer servicing your locality for a replacement battery. (b) Reinitializing · The lithium battery maintains the content of the setting of the menu and soft key even when the power is shut off allowing use under the conditions of the last use. ⷠIf this battery runs down, all conditions including the menu will automatically be reset. For this reason, initializing is required after replacement of the battery. When the battery wears down, distance and bearing may become inaccurate. In the event immediate replacement of the battery is not feasible, initialization should be undertaken each time the power is turned on as an emergency measure. [. . . ] If a rectifier unit is used, in particular, turn off power to the display unit. Note that voltages from the rectifier unit are always present even if the radar is stopped. When performing maintenance or inspection of the scanner unit, be sure to shut off the safety switch of the scanner unit after turning off the power of the display unit. Failure to do this may cause severe electric shock or breakdown or the sudden movement of the scanner unit may cause bodily injury or breakdown. [. . . ]