" In one Traveller session I in and have notes for the
 ship was skimming for fuel which is an undertaking of a
 hazardous nature in my opinion. The notes have the failure
 criteria as 7+ without any modifiers we rolled an 8 adding
 and subtracting modifiers put the final total a 10. The ship
 was lost with all hands."

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Considering how often the IN performs fuel skimming (just look at how many IN ships are equipped for it)
I, as GM, have considered it as a base 'routine' operation subject, of course, to modifiers.

However, I wasn't at your session so I'm not privy to what may have influenced the decision to classify that skimming op as 'hazardous'

In any case, this illustrates how much a GM's discretionary powers can influence the course of events.

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