Average Most Probable Discharge (AMPD) coverage applies only to tank vessels when they are transferring cargo. AMPD coverage is not required for bunkering and does not apply to nontank vessels.

Vessels conducting cargo operations at a terminal facility are afforded AMPD coverage through the terminal’s AMPD service provider. The only known exception is the offshore mooring at Barbers Point, Hawaii.

We recommend your Oil Spill Removal Organization (OSRO) be notified of all lightering operations. Your OSRO may require up to 24 hours advance notice to arrange AMPD coverage. Some areas may also require special arrangements and additional fees. Please contact your contracted OSRO provider listed below to arrange and receive confirmation of coverage.

Marine Spill Response Corp. (MSRC)

220 Spring Park Place, Suite 500
Herndon, VA 20170 USA
T: +1 800 645 7745
24 Hr: +1 732 417 0175
F: +1 732 417 0097

National Response Corporation (NRC)

3500 Sunrise Highway, Suite T103
Great River, NY 11739, USA
T: +1 631 224 9141
24 Hr: +1 800 899 4672
F: +1 631 224 9086


Vessels that have MSRC identified as the contracted OSRO in the VRP should contact them directly regarding AMPD coverage using the contact details provided or by completing the online request form available on their website. MSRC will provide confirmation of coverage, NOT Witt O’Brien’s.


Vessels that have NRC identified as the contracted OSRO in the VRP should contact them directly regarding AMPD coverage using the contact details provided, complete and return their AMPD Authorization To Proceed (ATP) Form. Please return the completed form directly to NRC. Witt O’Brien’s does NOT need a copy. NRC will provide confirmation of coverage, NOT Witt O’Brien’s.


Vessels requiring AMPD coverage in Delaware Bay may also obtain it through a local cooperative, Delaware Bay and River Cooperative (DBRC) rather than MSRC or NRC, the contracted OSRO listed in the VRP.

DBRC’s Voyage Coverage provides protection for your vessel from sea buoy to sea buoy. This arrangement provides you and your Spill Management Team access to DBRC’s vast local resources and knowledge for the duration of your port call for the same fee others charge for AMPD coverage alone. Delaware Bay AMPD coverage requests submitted using the link to the right will have their AMPD requests forwarded to DBRC. DBRC will also provide confirmation of coverage, NOT Witt O’Brien’s.


All vessels trading within territorial waters of Canada under the Canadian Shipping Act must have a contract with a Certified Response Organization (CRO).

Vessels trading to the west coast of Canada must have a contract with the Western Canada Marine Response Corporation (WCMRC) arranged through British Columbia Chamber of Shipping (BCCS).

Vessels trading to the east coast; St. Lawrence Seaway and Great Lakes of Canada must have a contract with the Eastern Canada Response Corporation (ECRC).

This contract is called a Multi GAR (Geographic Area of Response) contract encompassing several Certified Response Organizations that provide the actual cleanup services.

Vessels must also have the Declaration for a Ship that is in Waters South of the Sixtieth Parallel of North Latitude (Canada Declaration). This Canada Declaration is essentially the Vessel Response Plan for Canada.

For assistance in arranging Canadian coverage and completing the Canadian Declaration please contact us at


The State of California adopted increased response planning requirements effective October 1, 2009. These requirements apply to all vessels, tank and nontank that call California ports. Plan holders, depending upon their OSRO, may in some cases only be required to obtain additional OSRO coverage when operating or transiting the following areas:

  • Port Hueneme
  • Santa Barbara Channel – southbound traffic lane only
  • Southern San Francisco Bay – south of the San Mateo Bridge in route to Redwood City
  • Eureka or Humboldt Bay
  • San Diego

It is recommended that plan holders contact their contracted OSRO directly to confirm and/or obtain the required additional coverage at least 24 hours prior to their vessels calling, operating, or transiting the areas listed above. There may be additional costs associated with this coverage.