I've Got Gas !!!

[Reverie]

So we've accomplished our assigned patrol, and later spent every eel, and a portion of our 88mm shells, all this within three days range of base.
Getting renown from successfully reporting contacts is understood, but just how much renown is awarded ? And is renown awarded for multiple reports on one patrol ?
With most of my fuel supply available, I want to know if it's worthwhile being a convoy spotter / weather boat ? (The weather boat aspect would be simply roleplaying, but we've got to have fun.)
Reverie