Originally Posted by 80ktsClamp

If ALV is 80, your guarantee is 78, so at 77:59 you're good for another trip. Only when you hit 78 are you done.

You're good for a 17:01 trip then!

IIRC rsv guarantee does not go above 78, amirite?

So if ALV is 82, then you can be taken at 77:59 for a 19:01 trip instead.