TM 55-1930-209-14&P-12
CHAPTER 3 FOGHORN EQUIPMENT
Section I. Description and data
3-1 Description. The foghorn produces an omidirectional sound to warn approaching vessels of barge location during
periods of poor visibility. The foghorn shown in Figure 3-1 consists of the major components listed in Table 3-1.
Installation is shown on drawings listed in Appendix A. Additional information about the equipment is contained in
manufacturers' service manuals/instructions in Appendix B.
3-2 Capabilities. The foghorn meets USCG requirement 33 CFR 67 for a 1/2-mile sound signal. It sounds automatically
for approximately 2 seconds, is silent for 18 seconds, and repeats the cycle until turned off. The foghorn sound can be
heard in all directions.
3-3 Special limitations. The foghorn does not provide any warning to barge crew members of approaching vessels.
3-4 Performance-characteristics
Power input
12 Vdc/2A
Frequency
390 +/- 3 Hz
Distance of sound
1/2 mile in all directions
Frequency of sound
2 seconds with 18 seconds silence
Sound level
122.7 dB @ 12 V
3-5 Equipment specifications
a.
Foghorn remote control
Manufacturer
Pennwalt Corp
Automatic Power Division
CAGEC
28763
Part no
9001-0454
Quantity
1
b.
Regulator (converter assembly)
Manufacturer
Pennwalt Corp
Automatic Power Division
CAGEC
28763
Part no
9040-0033
Type
Solid state
Rating Input
24 Vdc, output 12 Vdc
Quantity
1
c.
Foghorn
Manufacturer
Pennwalt Corp.
Automatic Power Division
CAGEC
28763
Part no.
1001-1100
Type
Omnidirectional w/ timer, OSC/
regulator, driver and hub
Quantity
1
3-6 Items furnished
3-6.1 Components installed as part of the foghorn are listed on the parts list of drawings referenced in Appendix A and in
the Components of End Item List in TM 55-1930-209-14&P-20.
3-6.2 Common and bulk Items onboard are listed in the Expendable Supplies and Materials List in TM 55-1930-209-
14&P-20.
3-1
