D or no D?
The "D" stands for 'delayed', and it's ALWAYS better to wait until the end to pop that sausage. Wait... what?!? Sorry for the catfishing there, but this is about your SMB, or Surface Marker Buoy, and what you've actually been diving with, which has a giant D in front of it. There's some terminological brain constipation in the dive industry regarding two very different pieces of equipment: an SMB, and…