i have noidea wha pp dive in a deh about 35 meter without capslusuit , just i see thoase on timex whet ever 35 meter on tube( not bottel as bottel an backup /rsuce ,resev in locations , i often diveed alone in 10 mx 12 liter with th 5 liter bottel on press air.,... i hate hevy exuipment today and i dint used it for long ...