OSTC Mk.2, 2N and 2C (Sold between 2007 and 2014)

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End of Hardware Support for OSTC 2N and Mk.2

Last post by swissdiving « 14 Jan 2026, 13:30
Replies: 6
by heinrichsweikamp » 07 Jan 2026, 13:03

6 Replies

57408 Views

Last post by swissdiving
14 Jan 2026, 13:30
New registered user? Please read.

Last post by heinrichsweikamp « 14 Feb 2024, 10:30
Posted in OSTC+, 3, cR, sport, nano and OSTC 2 (Mod. 2015 and later)

by heinrichsweikamp » 14 Feb 2024, 10:30 » in OSTC+, 3, cR, sport, nano and OSTC 2 (Mod. 2015 and later)

0 Replies

229904 Views

Last post by heinrichsweikamp
14 Feb 2024, 10:30
USB OSTC users - please read!

Last post by heinrichsweikamp « 24 Oct 2023, 13:42

by heinrichsweikamp » 24 Oct 2023, 13:42

0 Replies

193783 Views

Last post by heinrichsweikamp
24 Oct 2023, 13:42
New 3.16 Firmware

Last post by heinrichsweikamp « 12 Apr 2026, 13:16
Replies: 4
by heinrichsweikamp » 24 Oct 2023, 11:02

4 Replies

192677 Views

Last post by heinrichsweikamp
12 Apr 2026, 13:16
FAQ: Battery charging / Laden der Batterie

Last post by heinrichsweikamp « 18 Apr 2020, 11:16
Replies: 1
by heinrichsweikamp » 17 Apr 2016, 12:31

1 Replies

78249 Views

Last post by heinrichsweikamp
18 Apr 2020, 11:16
OSTC Mk.2, 2N or 2C Firmware Update - HowTo

Last post by googra « 03 Feb 2026, 05:37
Replies: 6
by heinrichsweikamp » 05 Feb 2011, 11:36

6 Replies

108944 Views

Last post by googra
03 Feb 2026, 05:37

Topics

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Stolen: OSTC 2C #7038

Last post by Boris « 28 Oct 2026, 17:56

by Boris » 28 Oct 2026, 17:56

0 Replies

50 Views

Last post by Boris
28 Oct 2026, 17:56
OSTC Mk2 Screen staying dark

Last post by nickpicks « 15 Jun 2026, 12:20
Replies: 4
by nickpicks » 09 Jun 2026, 18:50

4 Replies

76194 Views

Last post by nickpicks
15 Jun 2026, 12:20
Reset

Last post by UrsiGill « 01 Jun 2026, 12:14
Replies: 3
by molisub » 21 May 2016, 18:36

3 Replies

23034 Views

Last post by UrsiGill
01 Jun 2026, 12:14
Left button unresponsive

Last post by swissdiving « 30 May 2026, 17:52
Replies: 3
by Cato » 18 Sep 2016, 19:27

3 Replies

25446 Views

Last post by swissdiving
30 May 2026, 17:52
usb cable

Last post by UrsiGill « 28 May 2026, 09:27
Replies: 7
by gilles » 29 Mar 2018, 09:21

7 Replies

31061 Views

Last post by UrsiGill
28 May 2026, 09:27
Problem during upgrade

Last post by UrsiGill « 26 May 2026, 08:40
Replies: 5
by bourgetel » 24 May 2023, 10:19

5 Replies

64124 Views

Last post by UrsiGill
26 May 2026, 08:40
Deco time wrong

Last post by jb2cool « 07 Feb 2026, 21:05
Replies: 3
by Dimitri » 27 Jan 2026, 10:31

3 Replies

41951 Views

Last post by jb2cool
07 Feb 2026, 21:05
PDF Manual for model 2C pre 2015

Last post by farid « 22 Dec 2025, 16:23
Replies: 4
by farid » 27 Oct 2025, 07:29

4 Replies

33043 Views

Last post by farid
22 Dec 2025, 16:23
Ploywatch? Remove Scratches

Last post by Motardplongeur « 04 Jan 2025, 11:37
Replies: 7
by Satyre » 02 Jan 2025, 12:32

7 Replies

1213954 Views

Last post by Motardplongeur
04 Jan 2025, 11:37
Updated List of Custom Functions and explanations

Last post by Satyre « 02 Jan 2025, 12:30
Replies: 2
by Satyre » 30 Dec 2024, 11:03

2 Replies

48263 Views

Last post by Satyre
02 Jan 2025, 12:30
GF99 or equivalent function on 2N

Last post by Markus MDDT « 15 Aug 2024, 19:58

by Markus MDDT » 15 Aug 2024, 19:58

0 Replies

76321 Views

Last post by Markus MDDT
15 Aug 2024, 19:58
Two OSTC 2N showing different stops and times

Last post by ZNE « 10 Aug 2024, 11:07
Replies: 2
by ZNE » 28 Jul 2024, 17:10

2 Replies

50888 Views

Last post by ZNE
10 Aug 2024, 11:07
Buttons do not work when disconnected from USB

Last post by heinrichsweikamp « 11 Jul 2024, 09:40
Replies: 1
by subaqua.steve » 24 Jun 2024, 06:15

1 Replies

45173 Views

Last post by heinrichsweikamp
11 Jul 2024, 09:40
Compass - bearing

Last post by DidierF95 « 24 Apr 2024, 19:45
Replies: 2
by DidierF95 » 19 Apr 2024, 19:12

2 Replies

60182 Views

Last post by DidierF95
24 Apr 2024, 19:45
Cannot connect 2C and 2N to windows 11 laptop

Last post by heinrichsweikamp « 02 Apr 2024, 19:18
Replies: 11
by Pob06 » 09 Jan 2023, 22:06

11 Replies

160011 Views

Last post by heinrichsweikamp
02 Apr 2024, 19:18
OSTC 2N button doesn't work

Last post by heinrichsweikamp « 02 Apr 2024, 18:24
Replies: 4
by SIMONA » 19 Mar 2024, 11:26

4 Replies

60877 Views

Last post by heinrichsweikamp
02 Apr 2024, 18:24
Feature request: safety stop depth adjustment

Last post by heinrichsweikamp « 02 Apr 2024, 18:21
Replies: 1
by Walde » 02 Apr 2024, 16:46

1 Replies

53999 Views

Last post by heinrichsweikamp
02 Apr 2024, 18:21
OSTN 2n Comms issues

Last post by heinrichsweikamp « 22 Nov 2023, 14:27
Replies: 6
by MartinAmies » 17 Oct 2023, 09:25

6 Replies

154210 Views

Last post by heinrichsweikamp
22 Nov 2023, 14:27
OSTC 2N Back plate replacement

Last post by heinrichsweikamp « 22 Nov 2023, 10:03
Replies: 1
by Markus MDDT » 22 Nov 2023, 08:35

1 Replies

74932 Views

Last post by heinrichsweikamp
22 Nov 2023, 10:03
New 3.15 firmware

Last post by heinrichsweikamp « 24 Oct 2023, 11:02
Replies: 11
by heinrichsweikamp » 19 Jan 2021, 13:03

11 Replies

172034 Views

Last post by heinrichsweikamp
24 Oct 2023, 11:02
hwos 3.21 bluetooth issue

Last post by Albi « 30 Aug 2023, 12:24

by Albi » 30 Aug 2023, 12:24

0 Replies

160250 Views

Last post by Albi
30 Aug 2023, 12:24
Read OSTC 2n JSON Backup File

Last post by heinrichsweikamp « 09 Aug 2023, 09:40
Replies: 2
by aerobrain » 09 Aug 2023, 08:31

2 Replies

57528 Views

Last post by heinrichsweikamp
09 Aug 2023, 09:40
OSTC2 cannot connect Blue Tooth to Win11

Last post by swissdiving « 26 Jul 2023, 05:56
Replies: 2
by EuSch » 16 Jul 2023, 14:34

2 Replies

76711 Views

Last post by swissdiving
26 Jul 2023, 05:56
OSTC 2n V3.15 Wrong measurement and calculations

Last post by Pioulpou « 15 Jul 2023, 18:02
Replies: 2
by Pioulpou » 02 Jul 2023, 15:16

2 Replies

57496 Views

Last post by Pioulpou
15 Jul 2023, 18:02
OSTC2: Doesn't wake up

Last post by heinrichsweikamp « 19 Jun 2023, 13:07
Replies: 5
by budekatude » 03 Aug 2021, 17:06

5 Replies

80594 Views

Last post by heinrichsweikamp
19 Jun 2023, 13:07

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