I am a DM at a local dive shop in Key West and I guide divers on the Vandenberg several times a week. Everything in the video looked very professional. As a guide my job is to make sure my divers have a safe, good time. The guide in the video did this well. He monitored the air consumption of all his divers, made sure they were OK throughout the dive, and after each swim threw. My guess is his slate at the end said something about deep/safety stops, also great hand over hand on the line signal when they reached the line. What you did not see in the video, but my guess is, it was done, was a detailed dive briefing and plan with the guide and the 3 customers. Most of this dive was 90 -100 feet, they only were deeper than 100 for about one minute. The dive operation in the video requires every diver on the Vandenberg to have a computer (we send our divers to them if we do not have a boat going out). Most boats do a 1 hour SI before the 2nd dive and my guess is most guides spend a good amount of time on the 2nd dive in the 70 - 80 ft range as NDLs get close. Everything in the video looked like it should have, a guide that monitored the safety of his divers while showing them a great wreck.