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DSM250 User’s Manual
Page 16 Revision 1.4.16a
4.2.9 Environment
Barometric – displays the current atmospheric (barometric) pressure
Heat Index – displays the current heat index based on air temperature and humidity
Humidity Inside – displays the relative humidity from an indoor humidity sensor
Humidity Outside – displays the relative humidity for an outdoor humidity sensor
Moon Phase – displays the phase of the moon at the current time and position
Sunrise – displays the local time of sunrise for the current day and position
Sunset – displays the local time of sunset for the current day and position
Dew Point – displays the current dew point based on air temperature and humidity
Temp Engine Room – displays the air temperature from a sensor mounted in an engine room
Temp Inside – displays the air temperature from a sensor mounted inside the vessel
Temp Main Cabin – displays the air temperature from a sensor mounted inside the main cabin
Temp Outside – displays the air temperature from a sensor mounted outside
Temp Sea – displays the current temperature of the water
Twilight AM – displays the time of nautical twilight before sunrise for the current day and position
Twilight PM – displays the time of nautical twilight after sunset for the current day and position
Weather – displays a screen with a wide variety of weather-related data (See Section 7.8 for
details)
Wind Chill – displays the current wind chill based on air temperature and wind speed
4.2.10 Fluid Flow
Flow Rate – displays the current rate of flow of a fluid
Trip Volume – displays the total volume of fluid through the sensor on the present trip
4.2.11 Fuel Management
WARNING: Maretron fuel management products are designed to be accurate and
reliable; however they should be used only as aids for fuel management and not as
a replacement for traditional fuel management techniques. BEWARE: Conditions
can quickly change that drastically effect time and distance to empty.
You should not use the fuel management data types unless you fully understand
all the parameters associated with fuel management. All fuel tanks and all engines
must be included when setting up the DSM250 plus there must be accurate fuel
rate sensors installed on the vessel and accurate speed information in order for
the DSM250 to properly display fuel management information. You should also
note that fuel levels may contain significant error if the boat is not sitting level in
the water (i.e., sailboat heeled over or a power boat riding bow up won’t
necessarily report the correct amount of fuel). Even when setup correctly, the
DSM250 should be used only as an aid and not the sole source for fuel
management information.
Total Fuel Economy – displays distance traveled per unit fuel used (for example, miles per gallon
or kilometers per liter) using the specified GPS and specified engine instances within the
favorite screen setup (see Section 5.2.6.4.2 for details).