Raymarine E120W Installation Manual

Also see for E120: Installation manual Reference manual

Contents

Raymarine E120W Installation Manual Manual pdf 46 page image

40 E-Series Installation ManualRadar alignment checksYou should check the bearing and display timing alignment to ensure that an accuratepicture is shown.Adjusting the bearing alignment ensures that targets appear at the correct bearingrelative to your boat’s bow. You need to select a visible target of known bearing that isdisplayed on the radar, and then adjust the radar set up as necessary until the correctbearing reading is obtained. You can carry out a bearing alignment in two ways:Bearing alignment with your boat mooredTo use this method you will need a hand bearing compass:1. Visually identify a suitable target, such as a buoy that can be seen towards the edgeof the radar screen. Typically, this will be on the 1.5nm range.2. Determine the accurate bearing of the target relative to your boat’s bow using thehand bearing compass. To do this subtract your boat head bearing from the targetvisual bearing, these examples may help:3. From the primary radar soft keys, press VRM/EBL.4. Toggle the VRM/EBL soft key to ON. Adjust the EBL to your chosen target. If there isa difference between your calculated bearing and that shown for the EBL, there isan alignment error and you will need to carry out bearing alignment adjustment(see below).Bearing alignment with your boat under way1. Align your boat’s bow with the selected target.2. Note the position of the target relative to the Ships Heading Marker (SHM) on theradar picture. If the target is not under the SHM, there is an alignment error and youwill need to carry out bearing alignment adjustment. For details see below.Adjusting the bearing alignment1. If moored, move the EBL to calculate bearing.2. With a radar application in the active window, press MENU. The Set Up menu is dis-played.Example 1 Example 2Visual bearing (a) = 065° M Visual bearing (a) = 030° MShips head bearing (b) = 021° M Ships head bearing (b) = 042° MRelative bearing:= (a) - (b)= 065 - 021 = 044° RRelative bearing:= (a) - (b)= 030 - 042 = -012If answer is negative, add 360° =-012 + 360 = 348° R