Commercial Jump ship

[Threndor (OP)]

I have made a couple 20kt jump tugs (large 109k jump engine and fuel ships if needed).

My question:
Ship tonnage that is allowed to jump. . .  is it limited to the 20kt of the jump ship, or 109kt of the jump engine?
I have a 40kt salvage ship I am trying to transit and it is getting errors.

[Erik L]

20ktons.

It is always the smaller of the hull size or jump engine. With the caveat that the JE cannot be bigger than the hull.