Figure 5-22.--IC/D call signal station. A. External view. B. Internal view.

Figure 5-22.--IC/D call signal station. A. External view. B. Internal view.

IC/D Interrupted Call Signal Station

station. Figure 5-23 is an elementary wiring diagram of

the 2EM (ship control) circuit.

This station is identical to the noninterrupted

The call signal stations located in noisy spaces may

station, except the hand-operated magneto generator has

include a visual indicator lamp to alert personnel of an

been modified to generate a pulsating voltage. When the

incoming call. A relay box nippled to an indicator lamp

generator handle is cranked, the pulsating voltage

produced will provide an interrupted howl at the

is installed adjacent to each call signal station. The relay

selected station.

coil is connected to the howler circuit of the station. The

relay contacts are connected to the nearest emergency

This call signal station is used along with the

lighting circuit. When the station howler is activated, the

noninterrupted call signal station in a space where two

relay coil is energized and the relay contacts operate to

different circuits are required; thus providing different

audible signals to alert personnel as to which station is

complete the circuit from the lighting system to energize

being called.

the indicator lamp.