User manual JRC JMA-3806

[. . . ] Maintain this instruction manual so that operators can refer to it at anytime. Various pictorial indications are included in this manual and are shown on these equipment so that you can operate them safely and correctly and prevent any danger to you and / or to other persons and any damage to your property during operation. Please understand them before you read this manual: This indication is shown where any person is supposed to be in danger of being killed or seriously injured if this indication is neglected and these equipment are not operated correctly. This indication is shown where any person is supposed to be injured or any property damage is supposed to occur if this indication is neglected and these equipment are not operated correctly. [. . . ] 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. â· 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. The target may be unable to be observed when the height of a scanner unit or an target is low. This is theoretically true but does not always hold, The intensity of returns from a target is related not only to the size of the target but also to the materials and shape of the components making up the target. Accordingly, larger objects do not necessarily develop strong returns. on coastlines , in particular , the intensity of returns is dependent on their physiographic features. For a coastline with a fairly gradual ascent, only inland mountains areas may be displayed as echoes. This fact needs to be kept in mind when measuring the distance to a coastline. Since the echo which returns from a coastline with a fairly gradual ascent is weak, observation of such land may not be able to be performed. Radio waves may be shielded if there is a large intercepting obstacle (e. ) in their propagation path and any targets behind the obstacle cannot be observed. A ship that is not displayed because of an island in between the own ship and the target ship An island that is not displayed because of heavy rain in between the own ship and the island On a wavy sea surface, an echo appears on the PPI screen as a bright defused image at the center of the screen. There are cases in which nonexistent targets appear as echoes or in which existing targets do not appear as echoes on the PPI screen. [. . . ] If the value is 100 or less, the beacon may be not possible to receive signals. In the event such phenomena as the distorted screen or the keys becoming inoperable occurs while the radar is in use, the following procedures shall be taken to initialize the system. (b) Push the key, key and key Power will be turned on as in normal operation for turning on power. It is necessary to perform the maintenance services listed below to keep the radar unit in good working conditions. [. . . ]