This issue has been raised before and we expect to improve on this with the next version. For now, you may want to make two A/C Type entries such as C-XYZ-Land and C-XYX-Sea and log times appropriately in the corresponding type. Hopefully breaking down the types will suffice as a workaround. I've dispatched a message to one of my chief beta team members who also is an amphib pilot. I've invited him to respond here to see how he goes about this.
Yes, I did what Neal suggested for my log and that's probably the best
you can do for the current version. It works sort of, but then
if you want the time-in-type for that type, you have to add
the two numbers together. Maybe he should put a manual calculator
function into logbook pro, huh? /Forums/emoticons/smile.gif