wookey

ben,
for what xavier wrote on a pm he used the scooter to be very fast even when descending and he reported that the shaft is not always descending straight forward and has small slopes.
further let's not forget that using a scooter enables the diver to fix on it the camera housing and the lights he needs to make the footage. another advantage of scootering in great dephts is that you reduce the dcs risks, in fact his dive lasted only for some 4h.