Underwater connector identification

Sealed multipole connectors
used for TTL Flash, etc.
verboten These connectors must not be disconnected underwater. A waterproof blanking cap is required if the connector is not in use.

N5 Nikonos 5
(N) Connector


ICS5 Ikelite ICS5 connector
(also used on ikelite pro-video light)


PT Olympus


S Sea&Sea 4-pin
Motormarine II
(S) connector.


Duo Sea&Sea Duo flash connector.
(on Sea&Sea and Inon flash units)

Wet Connectors
These connectors can be unplugged and re-connected underwater.
2-wire electrical connectors provide manual flash triggering only (not TTL).

E/O M Electro-Oceanic (E/O)
Used for flash trig and analogue video output
E/O bulkhead


ICS2 M Ikelite ICS2 (2-pin) Connector
(3rd pin is for reversal prevention only)
ICS2 bulkhead


Sealock M Male Sealock (Nelson) Connector.
On end of cable from flash unit.
Sealock F Female Sealock Connector.
To camera


Impulse 6 Impulse 6-pin connector.
Used for HDMI (video monitor) interface on Gates housings 


© Cameras Underwater Ltd. 2001, 2004, 2012.