Gala and Short were expert at managing dive time, but in the background another clock was always ticking.
For the youngest humpback whales we see in Maui waters, a dive time of 60 to 90 seconds is typical, but as the season progresses and calves mature, breath-holding time extends to three or four minutes.
Check the Project Aware site to see if you can volunteer dive time with a local event.
Although this rule is taught by diving agencies, compliance is questionable in part because early ascent prevents divers from using all the dive time they have purchased.
"But being able to pick up a few [fossilised] bones of an extinct marine mammal and estimate its dive time from that - that's miraculous".
The "must-have accessory for the connected scuba diver" started out simply measuring dive depth and water temperature, but DiveNav has added many more measurements in its dive analyzer, including ascent rate, tank pressure profile, dive time remaining and CNS clock if you dive Nitrox (and if you have to ask, you don't).
Dive tables make provisions for post-dive time at surface level before flying to allow any residual excess nitrogen to outgas.
So the discovery came relatively quick... roughly... twenty hours of dive time, if even that and in large part due to Bill Pfeiffer's intense, methodical organization and attack plan.
Although most dives were V-shaped, dives with a bottom phase by bird A had an average bottom phase lasting 6.0 s (max 24 s) which accounted for approximately 42% of the total dive time.
During BP dives, both birds spent a similar proportion of the dive time in the bottom phase (42 and 39%), but the overall dive duration and maximum depth was greater for bird A (t301>3.69, p<0.001).
