Telescopic LF-MF-HF-VHF-UHF mast
The LF-MF-HF portion of the ALN telescopic mast
is the main antenna at sea to receive the naval radio broadcast and
for submarine to shore communications. When coming up to periscope
depth, the telescopic mast is raised above water. Once the bottom
insulator rises above water, an antenna tuner is used to tune the
The VHF-UHF portion of the ALN mast is located
on top of the mast. It is used mostly for submarine to aircraft and
submarine to ship communications.
Photo above - This is the hydraulic control to raise and
lower the ALN antenna. This lever was located just outside the Radio Room door.
Photo above - Here it is again. The hydraulic control located
outside the Radio Room door to raise and lower the ALN antenna.
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more details on the ALN antenna
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