Tugs
Why tugs extend control margins — and why misunderstandings with tugs cause expensive damage Contents Use the links below to jump to any section: 1. What Tugs Really Provide Tugs do not “move the ship”. They provide external force at strategic points on the hull to: A tug adds force where the ship is weakest, […]
Anchoring
Why anchoring is not stopping — it is controlled restraint Contents Use the links below to jump to any section: 1. What Anchoring Really Is Anchoring is not “stopping the ship”. It is placing the ship on a flexible restraint system that must absorb: The ship is still moving — just within limits defined by […]
Berthing
How ships actually come alongside — and why most berthing failures happen slowly, not suddenly Contents Use the links below to jump to any section: 1. What Berthing Really Is Berthing is not “parking a ship”. It is a progressive surrender of manoeuvring space while maintaining just enough control to stop safely at a fixed […]
Environmental Forces on the Hull
Why wind, current, and waves often matter more than helm Contents Use the links below to jump to any section: 1. Why Environmental Forces Dominate at Low Speed Environmental forces act continuously.Propulsion and rudder forces act intermittently. As ship speed reduces, the forces generated by propulsion and rudder decay rapidly — but wind, current, and […]
Low-Speed Control & Loss of Rudder Effect
Why “dead slow” is often the least controllable speed Contents Use the links below to jump to any section: 1. Why Low Speed Feels Safer — and Isn’t Reducing speed is instinctively associated with safety. In many situations, that instinct is correct — but at very low speed, the opposite can become true. As speed […]
Stopping, Turning & Crash Manoeuvres
Why ships do not respond when you need them to most Contents Use the links below to jump to any section: 1. Why Stopping and Turning Are Often Misjudged Most people instinctively expect ships to behave like vehicles. They do not. A ship does not stop because you order it to.It stops when momentum has […]
Hydrodynamic Interaction
When water starts steering the ship — and the helm stops being in charge Contents Use the links below to jump to any section: 1. What Hydrodynamic Interaction Really Is Hydrodynamic Interaction (HI) is not contact.It is force transmitted through moving water. When a ship moves, it drags water with it, accelerates it, and displaces […]
Post-Voyage Review & Lessons Learned
Why experience only matters if it is captured, questioned, and reused Contents Use the links below to jump to any section: 1. What a Post-Voyage Review Really Is A post-voyage review is not paperwork.It is risk harvesting. It exists to extract information from a completed voyage that can: If a review only confirms that the […]
Common Passage Planning Failures
Why ships with “approved plans” still run aground Contents Use the links below to jump to any section: 1. Why Studying Failures Matters Accidents rarely introduce new lessons. They repeat old ones — often word for word. Investigations consistently show that the tools existed, the plans existed, and the information existed. What failed was how […]
Contingency & Abort Points
Deciding to stop before stopping becomes impossible Contents Use the links below to jump to any section: 1. What Contingency Planning Really Means Contingency planning is not pessimism.It is respect for uncertainty. It accepts that: A contingency is not an emergency.It is a foreseen loss of assumptions. Planning for contingencies is planning for reality. 2. […]