Nav station switches

(return to Systems Description "12-v DC")

Bilge pump 3-way toggle switch -

POSITION	ACTION
UP	automatic: starts when a certain level is reached, stops when lower level reached
CENTER	off: pump never runs
DOWN	manual: pump runs whether or not there's water to pump

• Notes (above):
  • Do not let bilge pump run "dry"; when in DOWN position, turn switch to CENTER or UP when higher-pitch sound from pump indicates all water is pumped out.
  • Pump is NOT fused in Nav Station switch panel; fuse is inline, bundled in Battery 1 wiring, in battery compartment behind nav table seat, AGC 15-amp.

Upper horizontal row of 6 toggle switches (up is ON)

SWITCH	AMPS	CAPTION	OBSERVED FUNCTION
1	30-A	MAIN	powers (12-V) upper 2-6, lower 1-6 switches
2	10-A	NAVIG LIGHTS	believe lights these that Ted fixed (Aug-Sep07)
3	10-A	STEAMING LIGHT	blows #3 CB after drawing > 50-A
4	10-A	CABIN LIGHTS	not observed (Sep07)
5	10-A	PRESSURE WATER	shows c. 5-A when pump runs
6	10-A	BLOWER	(blower probably disconnected (Sep07))

Lower horizontal row of 6 switches (up is ON)

SWITCH	AMPS	CAPTION	OBSERVED FUNCTION
1	sw?	SUMP PUMP	unknown
2	sw?	FORE DECK ILLUM	blows CB (Sep07)
3	sw?	NAVIG INSTR	no observed change
4	sw?	MASTHEAD LIGHT	shows approx 2-amp, don't know what light goes on
5	sw?	RADIO	activates fixed VHF power
6	sw?	ACCESSORY	probably works, but passageway socket disconnected?)

Note: in AMPS column above, "sw?" means that (Apr08) we saw no amperage rating on these

switches, which may imply that they are switch-only devices, without a circuit breaker;

in this case, they use the leftmost upper switch (#1) for over-current protection.

TODO: spelunk further under the wiring pile for possible CB amperage values.

Vertical column of 7 switches (right is ON)

SWITCH	AMPS	CAPTION	OBSERVED FUNCTION
1	SW	no caption	not wired up
2	25-A	Auto Pilot	unknown
3	SW	REFRIGERATION	unknown
4	SW	STROBE	unknown
5	SW	ANCHOR	unknown?
6	??-A	PHONE	unknown? (note: there's a "phone" shore conn.)
7	05-A	RADAR	activates RADAR power (approx 3-amp warm-up)
8	05-A	NAV/COM	(Thom's note says "no switch"??)

NOTE: "SW" above indicates that we observed (Apr08) no marking on these

switch units to indicate they have any circuit-breaking function.

We unfortunately seem to have lost track of the backs of the switches and

what some of them are used for based on the panel markings: the bottom two units

as seen from the back are 5-A CBs; we know that the bottom one is not connected;

the next-to-bottom CB's wiring has been cut, and the RADAR has indeed been removed

for over-winter testing. But we have 8 switches listed above, but our notes only have 7

backs-of-switches surveyed. TODO: reconcile front -and- back info.

Right-hand sub-panel (NAV instruments):

   (no info available yet (Sep07))
   This unit controls meter illumination intensity in Nav instruments; 
   it may also control powering them on and off.  
   (ThomS has notes on wiring, but can't locate it Apr08.)