If you want to claim the vessel is unseaworthy because it is not manned properly and there are no manning standards or requirements you will be hard pressed to make that case.
If you are just pissed off because you don’t like what they are doing, just say so, don’t try to make some holier than thou case based on manning regulations and certificates.
A court or maritime authority can find a vessel unseaworthy for a myriad of reasons. Be careful of what you ask for since you might not like those standards applied to you or your own vessel. I suspect that if held to the standards the anti anti whalers are demanding, a few folks here might find themselves on the beach.