Garmin Fishfinder 250 Owner's Manual

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Garmin Fishfinder 250 Owner's Manual Manual pdf 32 page image

BASIC OPERATION > U SING THE MAIN MENU28 Fishfinder 250/250C Owner’s ManualUnits TabThe Units tab defines units of measure.Main Menu—Units tabThe following settings are available:• Depth—select units of measure for depth in Feet (ft),Fathoms (fa), or Meters (m).• Temperature—select units of measure for temperature inFahrenheit (°F) or Celsius (°C).• Distance and Speed—select units of measure for distanceand speed readouts in Nautical (nm/ft, kt), Nautical (nm/m,kt), Statute (mi, mh), or Metric (km, kh) terms.• Position Format—change the coordinate system in which aposition reading is displayed. The default format is latitudeand longitude in degrees, minutes, and thousandths of aminute (hddd°mm.mmm’). The following additional formatsare available: latitude/longitude in decimal degrees (hddd.ddddd°) and latitude/longitude in degrees, minutes, andseconds (hddd°mm’ss.s”).• Heading—select the reference used in calculating headinginformation for the the following advanced data fields:Bearing, Compass, Course, and Track (pages 23-24). Truewill display data with reference to True North. Magneticwill display data with reference to Magnetic North usingthe magnetic variation value received in the RMC NMEAsentence (page 23).Sonar TabThe Sonar tab allows you to initialize settings and calibrations.Main Menu—Sonar tab