We recommend that you keep your dive computer’s firmware up to date.
hwOS4 for OSTC 4 and OSTC 5 (V 1.7.3) (ZIP File)
hwOS sport for OSTC sport / OSTC plus / OSTC 2 / OSTC 2 TR (v10.87) (ZIP File)
hwOS tech for OSTC 3 / OSTC 2 / OSTC 2 TR / OSTC cR / OSTC plus (v3.29) (ZIP File)
Firmware for OSTC 2C / OSTC 2N / OSTC mk.2 (v3.16) (ZIP File)
Firmware for DR5 (v2.10) (ZIP File)
OSTC Companion for OSTC 4 / 5 / OSTC 3 / OSTC 2 / OSTC sport / OSTC plus / OSTC+ (ZIP File)
Bootloader V2 (only for OSTC 2C, 2N and Mk.2!) (ZIP File)
