Question 1

A Captain of the Port (COTP) in the US issues an order restricting a vessel's movement pending correction of a finding. How does COTP authority differ from the detention mechanism used under Paris/Tokyo MoU?

Accepted Answer

COTP authority is broader than a simple detention — it is a standing local command authority (under 33 CFR Part 6) that can restrict movement, require escort, deny port entry, or impose other operational conditions specific to that port's circumstances, not just hold the vessel at the berth where the deficiency was found This is a genuinely distinct authority structure: COTPs hold broad local command power over their port/waterway, which gives the USCG operational tools (movement restriction, escort requirements, conditions of entry) beyond the comparatively narrower "ship stays at the dock until fixed" detention model most MoU regimes use. Crew should understand that a COTP order can be more operationally restrictive and locally specific than a standard MoU detention.

Question 2

The US Coast Guard's Port State Control programme is sometimes called the "tenth pillar" of global PSC, alongside the nine regional MoUs (Paris, Tokyo, etc.). What is the key structural difference between USCG PSC and the regional MoUs?

Accepted Answer

The MoUs are international agreements between multiple flag/port states sharing inspection data and harmonised deficiency codes; USCG PSC is enforced unilaterally under US domestic law (not a treaty-based MoU), giving the US Coast Guard independent authority to set its own targeting criteria, programmes, and enforcement tools without needing multilateral agreement This distinction matters operationally: because USCG PSC is domestic enforcement rather than a multilateral MoU, the US Coast Guard can introduce its own incentive programmes (QUALSHIP 21), its own targeting matrix, and its own additional security regime (MTSA) layered on top of the IMO conventions every MoU also enforces — none of which require agreement from other states the way a MoU revision would.

Question 3

The USCG Safety and Environmental Protection Compliance Targeting Matrix scores vessels across multiple factors and sorts them into Priority I, Priority II, and Non-Priority categories — yet regardless of score, every foreign-flagged vessel is still examined at least once per year. What does this combination reveal about the design philosophy of the US programme?

Accepted Answer

Risk-based targeting concentrates inspector effort on higher-risk vessels for more frequent/detailed boarding, but a mandatory minimum annual exam exists as a floor so that even a low-risk-scoring vessel cannot avoid ever being inspected — the two mechanisms work together rather than one replacing the other This is a genuinely distinct design choice worth understanding: targeting matrices (used by USCG and most MoUs) optimise where to put limited inspector resources, but the USCG layers an absolute floor on top — no vessel, however well it scores, goes a full calendar year without an exam. A high-risk score adds extra/earlier boardings on top of that floor; it does not replace it.