Marine Connectors

Find suppliers and manufacturers of marine connectors for unmanned and autonomous systems; ROV, UUV, ASV, USV and subsea robotics.
Overview Marine Connectors
By Technology Editor Last updated: October 20th, 2023

Marine Electrical Connectors for Unmanned Systems

Marine connectors are designed to provide reliable connectivity in shipboard or underwater environments, and are essential for the design of unmanned vehicles such as UUVs (unmanned underwater vehicles), AUVs (autonomous underwater vehicles), ROVs (remotely operated vehicles) and USVs (unmanned surface vessels).

Marine Connectors by Fischer Connectors
Marine Connectors by Fischer Connectors

Marine connectors can be used to help transfer power and digital, RF or optical, signals from one subsystem to another, and connect external devices such as cameras, sonar or other sensors.

Underwater Connector Properties

Marine and subsea environments can cause galvanic corrosion due to saltwater spray, humidity and moisture, and thus connectivity issues may arise. Underwater connectors designed to operate in these environments may therefore have parts made from such materials as stainless steel, tin-plated copper, nickel-plated brass, and marine bronze.

Marine-grade electrical connectors may also be rated to different levels of environmental protection, such as IP68 and IP69, depending on the level of moisture or depth of water they are able to reliably function in. In addition to ingress protection, shock and vibration are other environmental factors that may affect marine connectors. These may arise due to engines, the effect of wind and waves, or bumping into docks and obstacles.

SEACON Underwater Connectors by TE Connectivity
SEACON Underwater Connectors by TE Connectivity

Types of Marine Connectors

Connectors suitable for use in maritime and underwater environments can be grouped into three marine connector types according to the conditions under which interconnects can be made:

Wet-Mate Connectors
Wet-mate connectors can be connected and disconnected while submerged, making them ideal for situations where a human diver may have to swap out equipment without returning it to the surface.

Splash-Mate Connectors
Splash-mate connectors can be connected while the faces are wet but not submerged.

Dry-Mate Connectors
Dry-mate marine connectors must be connected in air before being submerged.

Deep-sea and Subsea Connectors

Marine cable connectors for deep-sea applications will have to withstand large pressures. A common technology used in deep-sea connectors is PBOF (Pressure-Balanced Oil Filled), in which the part of the cable and connector assembly carrying the electric wires or fiber optic lines, is filled with oil to allow the pressure between the interior and the outside seawater to equalize whilst also resisting corrosion.