Upon seeing a seismic survey vessel:
Determine whether risk of collision exist or not. | |
If risk of collision exists, take early action and keep out the way of the vessel. | |
If altering to starboard, sound one short blast (supplemented by light at night). | |
If altering to port, sound two short blasts (supplemented by light at night). | |
Pass the stern of the vessel if possible, with a cpa 2 miles. |