The charterer's operations manager calls you on the phone demanding you proceed in 200m visibility. He threatens to hold you personally liable for the ETA delay. What do you do?

A. RESISTING COMMERCIAL PRESSURE — MASTER'S RESPONSE: (1) MASTER'S AUTHORITY: SOLAS Chapter V/34-1 — the master has sole authority for safety decisions. Commercial operators and charterers cannot legally order the master to take safety risks. This is clear in English maritime law; (2) ISM CODE SECTION 5: the company's Safety Management System must guarantee the master's authority to make decisions necessary for safety. If the company cannot guarantee this, their ISM Code is deficient; (3) RESPOND PROFESSIONALLY: "I understand the commercial importance of the ETA. However, proceeding in 200m visibility in the Dover Strait presents an unacceptable risk of collision. I am exercising my authority under SOLAS Chapter V and my company's SMS to wait for improved visibility. I will advise you as soon as conditions allow safe navigation."; (4) DOCUMENT: record the call in the deck log — time, caller, demand made, your response. This is legal protection; (5) NOTIFY DPA: call the DPA and advise: you have been pressured to proceed unsafely; you have refused; you are documenting the refusal. The DPA must support the master's decision under ISM; (6) P&I CLUB: the P&I Club should be aware — if commercial pressure causes a master to navigate unsafely and a casualty results, the company may lose P&I coverage; (7) FOLLOW-UP IN WRITING: after the call — email or telex to the charterer formally confirming your decision, citing SOLAS V/34-1 and the company SMS. This creates a written record; (8) DO NOT YIELD: if you proceed against your safety judgement and a collision results — you bear criminal liability regardless of who pressured you.

B. Comply with the charterer's demand — they are the paying party and their operational authority supersedes the master's navigation decisions in commercial charters.

C. Increase speed to 8 knots as a compromise. This satisfies the charterer's schedule requirement while reducing (but not eliminating) the visibility risk.

D. Transfer command to the chief mate who will make the navigation decisions. The master then has no personal liability for what happens during the transit.

A. COMMAND DECISION — 100M VISIBILITY: 100m visibility is extreme — visibility less than the vessel's own length. THE CORRECT DECISION: this vessel should NOT proceed into the Dover Strait TSS in 100m visibility. REASONING: (1) RULE 6 SAFE SPEED: a 200m tanker in ballast at any speed above absolute minimum cannot stop within 100m. Even at 3 knots, the stopping distance far exceeds visibility. No manoeuvrable speed satisfies the Rule 6 safe speed test; (2) TSS TRAFFIC: Dover Strait carries ~500 vessel transits per day. Other vessels of all sizes are in the TSS. At 100m visibility, you have zero warning of oncoming traffic until they are within 100m — effectively no warning; (3) MASTER'S AUTHORITY: under SOLAS V/34-1, the master's authority to make decisions for safety of the vessel is absolute. Commercial considerations CANNOT override this; (4) LEGAL EXPOSURE: proceeding in 100m visibility with no ability to comply with Rule 19 (safe speed, effective avoiding action) and causing a collision will result in criminal prosecution, civil liability, and potential imprisonment for the master; (5) CORRECT ACTION: wait. Heave-to outside the TSS or anchor in the Downs anchorage. Advise owners and charterers. The delay is finite — UK fog events typically last hours, not days; (6) ISM CODE: the ISM Code Section 5 gives the master overriding authority on safety matters. The company CANNOT instruct the master to proceed unsafely. Any such instruction must be refused and documented.

B. Proceed at 3 knots — this is safe speed in 100m visibility. ARPA will detect vessels in time at this slow speed and you can take avoiding action.

C. Increase speed to transit the Dover Strait as quickly as possible. Less time in restricted visibility equals less total risk.

D. Contact Dover VTS and ask them to clear the traffic lane before you transit. VTS has authority to hold other traffic while you pass.

A. FOG COLLISION LEGAL CONSEQUENCES — MASTER: (1) IMMEDIATE: render assistance to survivors (SOLAS V/33 — duty to assist); call MRCC for SAR; sound MAYDAY; recover survivors; (2) PRESERVE EVIDENCE: do not erase VDR. Preserve deck logs, ARPA recordings, bridge audio, AIS data, weather records, watch logs. Contact company DPA and P&I Club immediately; (3) COASTAL STATE: UK coastguard will direct the tanker to port for inspection. Do NOT depart the area without coastguard permission; (4) MCA INVESTIGATION: Marine Casualty Investigation under the Merchant Shipping (Marine Accident Investigation) Regulations 2012. MCA inspector will attend and seize records; (5) MAIB: the Marine Accident Investigation Branch (MAIB) will conduct an independent investigation under the Merchant Shipping (Accident Reporting and Investigation) Regulations 2012. MAIB is NOT a prosecutorial body but its reports are used as evidence; (6) CRIMINAL LIABILITY — MASTER: if the collision was caused by grossly negligent navigation (excessive speed in fog is classic), the master faces: (a) Gross negligence manslaughter (common law) — up to life imprisonment; (b) Health and Safety at Work Act offences; (c) COLREG violations (Merchant Shipping Act 1995 S98); (7) CIVIL LIABILITY: shipowner's P&I Club handles the civil claim from the fishing vessel owner and the deceased's family; (8) CoC SUSPENSION: MCA may suspend the master's certificate pending investigation; (9) FORMAL INQUIRY: if the circumstances warrant, a Formal Investigation (akin to a public inquiry) may be ordered under the Merchant Shipping Act 1995.

B. The company's P&I insurance covers all consequences. The master only needs to file an incident report with the company and no further personal legal exposure exists.

C. Collisions at sea are governed exclusively by COLREG — the master will be assessed under COLREG Rule 19 and no criminal proceedings can arise from a maritime collision.

D. Contact the company's lawyers before making any statements. The master should not communicate with the coastguard, MAIB, or MCA until legal representation is in place.