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@ DiveNav : why don't you have recorded in your database the OSTC (mk1 & 2) and the Dr5 ? HW
I don't know for US dealers, I'm European.
The link I posted was the site of the manufacturer.
Algo : ZHL-16 + GF
Air, Nx, Tx, OC, CC
OSTC : wiki+ forum
Dr5 : wiki+ forum + datasheet