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CV32 -> RE: Harpoon Classic Scenarios (12/12/2008 1:24:22 PM)
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All units of one side in HCE are in constant communication with one another (networked, if you will). It really has nothing to do with submarines. The player (as the Commander) have total control of all units at all times. Just the nature of the sim.
As for real life ...
The UQC (commonly called the 'Gertrude') is the limited range, high frequency sonar device used by submarines to communicate with each other and surface ships while underwater. The principal drawback (other than the limited range) is that anyone else nearby can also listen in, or determine the submarine's position with their own passive sonar.
Extremely low frequency (ELF) radio has worldwide range and works very well in water, but has a very slow transmission rate and so its most useful for short, coded messages.
Very low frequency (VLF) radio also has long range but lacks the depth penetration of ELF, so submarines communicating by VLF have to come up to a shallower depth.
Look up the role of the E-6 Mercury TACAMO aircraft for more on ELF/VLF. (The TACAMO can also communicate in other bands though).
Most usually, a submarine only comes up to communicate during a pre-arranged period or upon receiving an ELF/VLF signal. It might go to periscope depth to raise a comms mast or stream a comms buoy. If friendly forces know the sub's position, they can establish two-way comms via VHF or UHF.
Keep in mind, though, that given a submarine's primary reason for being (i.e. staying stealthy, focused on the mission, and exact whereabouts unknown), they don't usually have any reason to communicate unless its pre-arranged or they receive a message to pop up for a chat about something important.
Forgot to add that this may be the future of sub comms: Deep Siren.
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