Low Fuel Alarm; Boat Speed Sensors - NorthStar EXPLORER 657 Installation And Operation Manual

C When you remove fuel
1 Before removing fuel, go to the Fuel window,
press and select Set remaining.
2 On a multi-tank boat, select the tank that you
are removing fuel from.
3 Write down the value of Remaining for the
tank; this is the amount of fuel originally in
the tank.
4 Remove fuel from the tank and write down
how much fuel you remove.
5 Subtract the amount of fuel you removed
from the amount of fuel originally in the tank
to calculate the amount of fuel now in the
tank.

12-4 Low fuel alarm

To set a low fuel alarm for a tank:
1 Press twice, select Fuel then select
Setup tanks.
2 On a multi-tank boat, select the tank to set
the alarm for.
3 Select Tank alarm and enter a fuel level to
trigger the low fuel alarm.

12-5 Boat speed sensors

12-5-1 Selecting a boat speed sensor
The fuel calculations can use boat speeds from
the GPS, or from a paddlewheel sensor or pitot
sensor if these optional sensors are installed:
Paddlewheel and pitot sensors measure the
speed through the water; GPS speed is speed
over ground; these sensors can give different
values for Range, Economy and the fuel
consumption curves (see section 12-5-2).
A pitot sensor is more accurate than a
paddlewheel sensor at high speeds but is
not accurate at low speeds. A paddlewheel
sensor is more accurate than a pitot sensor at
low speeds.
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Note: You can also use this procedure when you
add fuel to a tank. In this case, add the fuel you
have added to the amount of fuel originally in
the tank to calculate the amount of fuel now in
the tank.
When a low fuel alarm is set, the alarm's fuel level
is shown on the fuel window tank levels as a red
bar. The alarm can also be set using the Alarms
setup menu (see section 17-9)
To select an optional speed sensor
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during a trip.
Northstar Explorer 657 Installation and Operation Manual
Change the number on the Set Remaining
menu to the amount of fuel that you
calculated was now in the tank.
Press
Press twice, select Fuel and select
Speed source.
To use a paddlewheel or pitot sensor, select
Water speed, otherwise select Ground
speed to use GPS speed.
If you selected Water speed and you have
both a paddlewheel sensor and a pitot
sensor:
i Press , select SmartCraft and
select Speed type
ii Select Paddlewheel or Pitot.
Tip: You can select a different speed sensor
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