Prepare the first-response map before cargo moves
14 October 2026 — A pollution emergency plan is most useful when the crew can turn it into action without searching through unfamiliar pages. For oil tankers of 150 gross tonnage and above, MARPOL Annex I requires an approved Shipboard Oil Pollution Emergency Plan (SOPEP). IMO’s guidance describes the plan as a working aid for the master and officers, not simply a document to keep available for inspection. Its value during an incident depends on whether the people on watch can quickly find the instructions and contacts relevant to the ship and its location.
Before transfer, identify where the plan is kept and how the watch can reach it. Check that the plan’s contact information and response instructions are usable by the people who may need them. IMO guidance calls for the plan to include contact details and a response flowchart, and says the plan should be written in the working language of the master and officers. A practical briefing can point out the ship’s reporting contacts, the person to notify on board, and the plan’s instructions for the first response. Those are preparation steps, not a substitute for the approved plan or the master’s direction.
The purpose is to shorten the path from noticing a release to taking coordinated action. A crew member should not have to guess whether to report first, who can stop or isolate the source, or where the applicable instructions are recorded. Use the ship’s approved procedures and the circumstances of the incident; do not treat a generic article or checklist as authority to depart from them.
Shipboard Marine Pollution Emergency Plans · Resolution MEPC.54(32): Guidelines for the Development of Shipboard Oil Pollution Emergency Plans · Resolution MEPC.117(52): Amendments to MARPOL Annex I
Keep immediate control and external reporting connected
IMO’s example response flowchart groups the work into assessment and action. It calls for alerting crew, identifying the spill source, and assessing the incident, while also considering actions such as leak sealing and use of available shipboard response equipment. In practice, these are linked tasks: the team needs to understand what is happening while the ship acts to stop or minimize the discharge and limit its effects. Assigning roles in advance can help prevent the response from depending on one person to investigate, coordinate, and communicate at once.
Reporting is a parallel part of the response, not an afterthought. The guidance identifies coastal State authorities, harbour or terminal operators in port, and ship interests among the possible contacts, with the applicable contact details held in the plan. The correct reporting route and required information depend on the incident and the relevant authorities. Use the ship’s SOPEP and applicable local instructions rather than assuming one contact list or reporting sequence fits every port or situation.
The flowchart also points crews to consider weather, tide, and swell; monitor the slick; record events and communications; and assess whether outside response assistance is needed. That list can inform a short pre-transfer discussion: where are the relevant instructions, who makes the required reports, and who maintains the event record while response actions continue? This keeps reporting, practical response, and situational awareness from becoming disconnected workstreams.
Resolution MEPC.54(32): Guidelines for the Development of Shipboard Oil Pollution Emergency Plans · Resolution MEPC.117(52): Amendments to MARPOL Annex I
Rehearse the handoffs, then learn from the record
A plan is easier to use when the crew has rehearsed how information and responsibility move between people. A tabletop discussion or onboard exercise can use a simple scenario: a suspected release is reported during cargo work. Participants can consult the approved plan and talk through how they would alert the relevant people, identify the source, decide on immediate action, make required notifications, and record key events. The exercise should test whether instructions and contacts are findable—not invent alternative procedures or replace the ship’s formal drills and requirements.
Pay attention to handoffs. Who tells the person in charge? Who contacts the terminal or the authority specified by the plan? Who keeps track of actions and communications? If the people involved cannot answer promptly from the ship’s procedures, note the gap and route it through the vessel’s safety-management process. The aim is to make the approved response usable, not to create a competing plan.
After an exercise or actual incident, review the timeline against the plan: when was the source recognized, what actions and notifications followed, and where did uncertainty slow coordination? IMO’s guidance includes keeping a record of events and communications as part of the response. A concise record also gives the ship a concrete basis for identifying unclear instructions, inaccessible contacts, or briefing needs. Keep the approved plan in control, and have any required changes handled through the proper approval process.
Resolution MEPC.54(32): Guidelines for the Development of Shipboard Oil Pollution Emergency Plans · Resolution MEPC.117(52): Amendments to MARPOL Annex I