Of cave diving origin I am sure, this is the most sensible diction to use when referring to how much money you will need to spend on the next bit of diving gear.
To be clear, a scuba unit is $1,000.
And, let’s be honest, that’s a pretty average amount to drop on a scuba purchase.
Cost of dry suit? 2 – 3 scuba units.
Cost of multi-gas dive computer? 1 scuba unit.
Cost of dive trip overseas? 3 scuba units.
Cost of liveaboard trip not overseas? 1.5 scuba units.
Rebreather? 5 – 10 scuba units
Lifetime of scuba diving? ∞ scuba units
So, forget scuba unit as a term to refer to your assembled scuba gear. There’s a much more useful explanation. And doesn’t it sound better than speaking in thousands of dollars?