Nav station switches

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

Bilge pump 3-way toggle switch (switch 01)

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, but its fuse is inline, bundled in
    wiring above Battery 1, in battery compartment behind nav table seat.
    Fuse is type AGC, current 15-amp.
  • See Systems Description for more mechanical, electrical, and operating info of this pump.

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

SWITCH	AMPS	CAPTION	OBSERVED FUNCTION
11	30-A	MAIN	powers (12-V) and protects upper #12-16, and lower #21-26 switches, but not 7 vertical switches
12	10-A	NAVIG LIGHTS	powers sidelights and sternlight
13	10-A	STEAMING LIGHT	powers steaming light
14	10-A	CABIN LIGHTS	powers cabin lights and fans
15	10-A	PRESSURE WATER	disconnected (Aug08)
16	10-A	BLOWER	blower disconnected (Aug08)

Lower horizontal row of 6 switches (up is ON)

SWITCH	AMPS	CAPTION	OBSERVED FUNCTION
21	?	SUMP PUMP	not connected
22	?	FORE DECK ILLUM	powers foredeck light
23	?	NAVIG INSTR	powers bulkhead nav instruments (as of Aug08, only depthmeter connected)
24	?	MASTHEAD LIGHT	powers tricolor light
25	?	RADIO	disconnected (Aug08)
26	?	ACCESSORY	powers companionway 12v socket & nav station pigtail 12v socket

Vertical column of 7 switches (right is ON)

SWITCH	AMPS	CAPTION	OBSERVED FUNCTION
31	SW	no caption	not wired up
32	25-A	Auto Pilot	unknown
33	SW	REFRIGERATION	unknown
34	SW	STROBE	unknown
35	SW	ANCHOR	unknown
36	05-A	PHONE	unknown (note: there's a "phone" shore connection on port quarter)
37	15-A	RADAR	activates RADAR power (approx 3-amp warm-up) (wire cut Apr08; RADAR removed to bench-test)
-	--	NAV/COM	no switch - switch handle hole plugged

NOTE: "SW" in the table above indicates that we observed (Apr08) no marking on these switch units
to indicate that they have any circuit-breaking function.

NOTE: The 12-volt feed to these seven vertical switches (31-37) are NOT protected against over-current
by the 'MAIN' circuit breaker on the top horizontal row of switches, nor by any other known breaker or fuse.
However, the ammeter DOES display these switches' current loadings

Right-hand sub-panel (NAV instruments):

   This unit controls meter illumination intensity in Nav instruments; 
   it probably also control powering them on and off;
   it also has a distance log, probably driven by a signal from e.g. knotmeter.  
   (ThomS has notes on wiring, only in markup form on a copy of panel wiring dgm.)