Top Menu

Information for Mariners

The Ocean Observatories Initiative (OOI) is an integrated system of marine scientific infrastructure with coastal and open ocean assets located in the North and South Atlantic and Pacific.  Some infrastructure have surface expressions (lighted buoys), while others are subsurface.  All locations of OOI assets are reported to the U.S Coast Guard.

Local Notices to Mariners

USCG First District LNM

USCG Thirteenth District LNM

Hotline Information

Pioneer Array – 508-548-1401

Endurance Array – 541-207-5690

Cabled Array (RSN) – 855-665-1424

Oregon Fishermen’s Cable Committee (OFCC) – 503-440-3569;;

Gliders/AUV – Atlantic: 508-548-1401; Pacific: 541-207-5690

For non-emergency inquiries, please contact the Help Desk.


Voluntary Avoidance Areas (VAA): the area around a mooring position or site center that we ask mariners/fishers to voluntarily avoid to prevent gear entanglement.

Precautionary Area (PA)*: Areas where the cable is not buried to target depth or where the depth of burial is not known.

    – The PA safety zone radius in all depths is a minimum 0.25 nm (463m).
    – OFCC fishermen are not restricted from fishing with gear on the seabed in these PA areas.
    – PAs are an advisory.

Known Cable Exposure (KCE)*: Areas where the submarine cable is on the surface, suspended, minimally buried or visibly exposed in a wide trench.

    – At depths <300 fms (550m), restriction within 0.25 nautical miles (~463m) of the exposure. - At depths >300 fms (550m), the KCE safety zone is enlarged to 0.40 nm (~741m).
    – OFCC fishermen are not to tow fishing gear on the seabed inside these safety zones.

*OFCC definition