Garmin GPSMAP 8700 Black Box Owners Manual - Page 70

Calibrate Water Speed: Calibrates the speed-sensing transducer or sensor (Calibrating a Water-Speed Device, page 62). Fuel Capacity: Sets the combined fuel capacity of all the fuel tanks on your vessel (Setting the Fuel Capacity of the Vessel, page 47). Vessel Type: Enables some chartplotter features based on the boat type. CZone™: Sets the digital switching circuits. SeaStar Instance: Sets the digital switching circuits. System Profiles: Allows you to save your system profile to a memory card and import system profile settings from a memory card. This can be helpful for charter or fleet vessels, and for sharing your setup information with a friend. Hull ID Number: Allows you to enter the Hull Identification Number (HIN).The HIN might be permanently affixed to the upper starboard side of the transom or outboard side. Optimus Steering: Allows you to adjust the Optimus steering parameters. Setting the Keel Offset You can enter a keel offset to compensate the water depth reading for the transducer installation location. This allows you to view the depth of the water below the keel or the true depth of the water, depending on your needs. If you want to know the water depth below the keel or the lowest point of your boat and the transducer is installed at the water line or anywhere above the end of the keel, measure the distance from the transducer location to the keel of the boat. If you want to know the true water depth and the transducer is installed below the water line, measure the distance from the bottom of the transducer up to the water line. NOTE: This option is only available when you have valid depth data. 1 Measure the distance: • If the transducer is installed at the water line or anywhere above the end of the keel, measure the distance from the transducer location to the keel of the boat. Enter this value as a positive number. • If the transducer is installed at the bottom of the keel and you want to know the true depth of the water, measure the distance from the transducer to the water line. Enter this value in as a negative number. • If the transducer is connected to the NMEA 2000 network, select Settings > Communications > NMEA 2000 Setup > Device List, select the transducer, and select Review > Keel Offset. 3 Select if the transducer is installed at the water line, or select if the transducer is installed at the bottom of the keel. 4 Enter the distance measured in step 1. Setting the Water Temperature Offset The temperature offset compensates for the temperature reading from a temperature sensor or temperature-capable transducer. 1 Measure the water temperature using the temperature sensor or temperature-capable transducer that is connected to the network. 2 Measure the water temperature using a different temperature sensor or a thermometer that is known to be accurate. 3 Subtract the water temperature measured in step 1 from the water temperature measured in step 2. This value is the temperature offset. Enter this value in step 5 as a positive number if the sensor measures the water temperature as being colder than it actually is. Enter this value in step 5 as a negative number if the sensor measures the water temperature as being warmer than it actually is. 4 Complete an action: • If the sensor or transducer is connected to the chartplotter or a sonar module, select Settings > My Vessel > Temp. Offset. • If the sensor or transducer is connected to the NMEA 2000 network, select Settings > Communications > NMEA 2000 Setup > Device List, select the transducer, and select Review > Temp. Offset. 5 Enter the temperature offset value calculated in step 3. Calibrating a Water-Speed Device If you have a speed sensor or a speed-sensing transducer connected, you can calibrate that speed-sensing device to improve the accuracy of water-speed data displayed by the chartplotter. 1 Complete an action: • If the sensor or transducer is connected to the chartplotter or a sonar module, select Settings > My Vessel > Calibrate Water Speed. • If the sensor or transducer is connected to the NMEA 2000 network, select Settings > Communications > NMEA 2000 Setup > Device List, select the transducer, and select Review > Calibrate Water Speed. 2 Follow the on-screen instructions. If the boat is not moving fast enough or the speed sensor is not 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 the speed-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 product support. 2 Complete an action: • If the transducer is connected to the chartplotter or a sonar module, select Settings > My Vessel > Depth and Anchoring > Keel Offset. Other Vessels Settings When your compatible chartplotter is connected to an AIS device or VHF radio, you can set up how other vessels are displayed on the chartplotter. Select Settings > Other Vessels. AIS: Enables and disables AIS signal reception. DSC: Enables and disables digital selective calling (DSC). 62 Device Configuration