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