Dunno, have to ask Zav about it.
Zavien, the idea run down goes this way:
We sink the troll's boat, but now have floating trolls.
We need to encourage them not to float for obvious reasons, and thought of using napalm or mogas.
Then it was asked "Does the VK R&D department even work with napalm and mogas or is it overkill?"
I admit, I dunno.
So I thought of asking you.