> Imagine one at sea.

One need not imagine such things. It took a week for the Freemantle Highway car carrier to stop burning, something 90% of HN denizens are blissfully unaware of due to narrative blindness, and only about 15% of its cargo was electric.

While a burning electric fishing vessel won't do well, understand that these operations are already fraught with risk and regularly experience minor disasters. The small operations are borderline piratic and the big operations are highly lucrative. It is unlikely that they will forgo whatever benefits they imagine due to some unquantified fire risk.

Teslas in NA use NMC chemistry (or a variant) which is much more dangerous than the LFP chemistry commonly used on boats. LFP cells are much harder to set on fire, and they don't burn anywhere as violently as more volatile chemistries.

nitpick: Tesla uses Panasonic's NCA in North America and LG's NCM for Long Range in China/EU.