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No mystery, sub-launched UAV-sub communications

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For some time thinking on this issue, but no new advaced communications system breakthrough.

At last is only a simple radio link with a submarine surface-piercing mast antenna, increasing the submarine exposure and vulnerability (very probably employed submerged in the VLF/LF receiving-only function):

 

https://news.usni.org/2016/05/16/aerovironment-to-supply-blackwing-mini-uavs-for-navy-attack-guided-missile-submarines

 

OE-538/BRC:

http://www.sippican.com/stuff/contentmgr/files/474e4a92db6e2ad9c7446b939a122dc4/sheet/oe_538.pdf

 

More generic concepts here:

http://fas.org/man/dod-101/sys/ship/docs/voices.htm

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