Currently, crews that are ordered to transfer to a landship are unable to do so. Presumably because unlike grounded airships, landships are always suspended above the ground.
An easy solution for this would be for a single airsailor to go to a supply hatch and drop a ladder to the ground. The last transferred airsailor could pull the ladder back up.
This could also apply to airships as well, so that transferring crew don't have to climb the sides like they're breaking in, and the airship wouldn't have to ground completely to transfer crew, though there would be a range limit to the ladders.
(Edit: Yikes that's a glaring misspell in the title.)
That is a good point. A bit fiddly to make, but good point. :)