The proposal below was issued by Gotha on August 11, 1944, for use for low-level attacks. There were two proposals:
the first had a single-step speedboat hull attached to the bottom of a V-1 (Fi 103), and was to be used to attack ships, dams and quays.
the second method was for a cable attached to a low-flying V-1, which would then tow a speedboat hull filled with explosives.
Very little is known about this proposal, and as far as is known, nothing came of this
[The additional hull added to the V-1 is speculative and based on text description]