NW Explorations
NAVIGATOR OPERATING MANUAL
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The “accumulator tank” by the pump provides a “pressure head” for the pump, so the pump doesn’t need to run
so often. Instead, a pump cycle will provide for several minutes of routine water use before pressure diminishes
and the pump starts again.
It is a good idea to turn off the fresh water pump breaker whenever leaving the boat for any extended
period, lest a dripping faucet or broken hose cause the pump to run and waste your precious drinking
water.
4K4: Fresh Water Tank Gauge
There is a fresh water gauge for the combined tanks on the
lower helm panel above the helm console.
4K5: Fresh Water Tanks
The combined tanks hold 265 gallons. The tanks are in the
lazarette (see photo above.)
4K6: Salt Water Pump
The boat has a salt water pump to provide pressure to the washdown faucet to starboard on the bow adjacent
to the bow pulpit. The pump and its sea water inlet, valve and sea strainer are under the floor hatch just aft of
the forward stateroom berth.
It is a good idea to keep the seawater pump breaker in the DC panel “off” unless the pump is in use,
lest the hose connections break or leak, filling the vessel’s bow with water!
4K7: Waste Water
Waste water from the sinks and showers (but not from the toilets) is dumped overboard in accordance with
U.S. and Canadian law. From sink basins, the water simply flows by gravity overboard. Since the floor of the
showers is below the water line, built in shower sump pumps operate to lift this water back above the waterline
and dump it overboard.
It is therefore very important that the “shower drain pump” breaker in the DC panel be left “On”.
4L: Fuel System
4L1: Fuel System Concept
The diesel fuel aboard Navigator is carried in two tanks of 300 gallons each. This gives the boat great cruising
range, but it also means there can be a significant imbalance between the tanks if fuel is only used from one
tank for an extended period.
You should understand that diesel engines pump an excessive amount of fuel from the tank, use the excess
to cool the injection pump equipment on the engine, then return the unused excess to the tank! Typically, an
engine might pump 40 gallons/hour, but use only three or four: The 36 or 37 gallons “makes the circuit” through
the pump and back to the tank.
Fuel and water gauges above port saloon windshield.
