Waterjammers

Hello All

I have a question regarding one of my ideas. I have
been using waterjammer ships in my spelljammer
campaign. They are spelljammers, but they are
surrounded by liquid instead of an air envelope.

My question is about the ships and their tonnage.

Would the liquid envelope affect (added to) the rated
tonnage of the waterjammer ships?

If it would affect the ship's tonnage, then what
percentage of the tonnage would be the liquid? 50%?
75%?

If a spelljammer ship rams a waterjammer ship, will
the liquid envelope hold even when pierced?

If a waterjammer ship rams a spelljammer ship?

Will the liquid envelope affect the gravity plane?


Some examples of waterjammer ships:

1) Open wooden framework and decking, 2 levels, weave
seaweed wall on some areas, seaweed netting holding
cargo, shell throne (mother of pearl major helm), salt
water envelope with sea creatures swimming, Sea elves.

2) Enclosed ship (a submarine, think Captain
Nemo)surrounded by a yellow liquid envelope (poison?).

3) Small closed shuttle (ceramic, clam ship)
surrounded by fresh water, Aboleth?.

4) Old galleon, coral encrusted, salt water envelope
with sea creatures, Sahuagin.

Thanks in advance.

A.Sibal

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