Garmin GPSMAP A12 Owner's Manual

Also see for GPSMAP 7400 Series: Owner's manual Owner's manual Installation insrtuctions Owner's manual Installation instructions

Contents

Garmin GPSMAP A12 Owner's Manual Manual pdf 63 page image

Setting the Keel OffsetYou can enter a keel offset to compensate the water depthreading for the transducer installation location. This allows youto view the depth of the water below the keel or the true depth ofthe water, depending on your needs.If you want to know the water depth below the keel or the lowestpoint of your boat and the transducer is installed at the waterline or anywhere above the end of the keel, measure thedistance from the transducer location to the keel of the boat.If you want to know the true water depth and the transducer isinstalled below the water line, measure the distance from thebottom of the transducer up to the water line.NOTE: This option is only available when you have valid depthdata.1 Measure the distance:• If the transducer is installed at the water line oranywhere above the end of the keel, measure thedistance from the transducer location to the keel of theboat. Enter this value as a positive number.• If the transducer is installed at the bottom of the keeland you want to know the true depth of the water,measure the distance from the transducer to the waterline. Enter this value in as a negative number.2 Select Settings > My Vessel > Depth and Anchoring >Keel Offset.3 Select if the transducer is installed at the water line, orselect if the transducer is installed at the bottom of thekeel.4 Enter the distance measured in step 1.Setting the Water Temperature OffsetBefore you can set the water temperature offset, you must havea NMEA 0183 water-temperature sensor or a temperature-capable transducer to measure water temperature.The temperature offset compensates for the temperaturereading from a temperature sensor.1 Measure the water temperature using the temperature sensoror temperature-capable transducer that is connected to thechartplotter.2 Measure the water temperature using a different temperaturesensor or a thermometer that is known to be accurate.3 Subtract the water temperature measured in step 1 from thewater temperature measured in step 2.This is the temperature offset. Enter this value in step 5 as apositive number if the sensor connected to the chartplottermeasures the water temperature as being colder than itactually is. Enter this value in step 5 as a negative number ifthe sensor connected to the chartplotter measures the watertemperature as being warmer than it actually is.4 Select Settings > My Vessel > Temp. Offset.5 Enter the temperature offset calculated in step 3.Calibrating a Water Speed DeviceIf you have a speed-sensing transducer connected to thechartplotter, you can calibrate that speed-sensing device toimprove the accuracy of water-speed data displayed by thechartplotter.1 Select Settings > My Vessel > Calibrate Water Speed.2 Follow the on-screen instructions.If the boat is not moving fast enough or the speed sensor isnot registering a speed, a message appears.3 Select OK, and safely increase the boat speed.4 If the message appears again, stop the boat, and ensure thespeed-sensor wheel is not stuck.5 If the wheel turns freely, check the cable connections.6 If you continue to get the message, contact Garmin productsupport.Other Vessels SettingsWhen your compatible chartplotter is connected to an AISdevice or VHF radio, you can set up how other vessels aredisplayed on the chartplotter.Select Settings > Other Vessels.AIS: Enables and disables AIS signal reception.DSC: Enables and disables digital selective calling (DSC).Collision Alarm: Sets the collision alarm (Setting the Safe-ZoneCollision Alarm, page 10).AIS-EPIRB Test: Enables test signals from Emergency PositionIndicating Radio Beacons (EPRIB).AIS-MOB Test: Enables test signals from man overboard (MOB)devices.AIS-SART Test: Enables test transmissions from Search andRescue Transponders (SART).Settings that are Synced on the GarminMarine NetworkThe following devices sync certain settings when connected tothe Garmin Marine Network.• echoMAP™ 70 series• GPSMAP 507 series (software version 3.0 or later)• GPSMAP 701 series (software version 3.0 or later)• GPSMAP 702 series• GPSMAP 800 series• GPSMAP 902 series• GPSMAP 1000 series• GPSMAP 1002 series• GPSMAP 1202 series• GPSMAP 7400/7600 series• GPSMAP 8400/8600 seriesThe following settings are synced, if applicable, to the device.Alarm Settings (also syncs alarm acknowledgment):• Arrival• Anchor Drag• Off Course• GPS Accuracy• Shallow WaterDevice Configuration 55