Ah, so putting a bubble in safety is, in fact, adding a little bit more positive buoyancy to the boat?
Would a bubble in safety be put in times where there is no damage?
If the trim analysis for a specific dive were to be "Heavy overall and all right fore and aft", would a remedy be putting a bubble in safety to establish the trim?
(I love this thread, so much to learn, so many willing to teach)
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