Atlantic crossing watch rota

An Atlantic crossing is long enough that a bad watch rota becomes a medical problem, and regular enough that you can plan it in the marina. The ARC, an independent tradewind crossing, a delivery south: the ocean does not care which banner is on the spreaders. The crew size and the first three nights do.

Why two weeks changes the system

A Channel hop can survive an unfair grid. A fourteen-day tradewind crossing cannot. Sleep debt compounds. The person who “doesn’t mind the graveyard watch” on night one minds it on night eleven. Pick a system that moves the nights, or you will be having a crew conversation in the trades that you should have had in Las Palmas.

For six in rotation that is usually the Swedish watch system or staggered pairs. For four, four on four off with dog watches or 6-6-4-4-4. For two, read two-handed and be honest about stops. The comparison sits in watch systems.

Crew size on an Atlantic boat

Count people in rotation, not heads on the dock. A skipper who navigates, a cook who is not on watches, a teenager who can only stand day watches: they change the arithmetic. Six adults who will all stand night watches is a different boat from four adults and two passengers.

Mixed experience is the ARC normal. Staggered pairs exists for that: a handover never clears the whole deck, so a novice is always with someone who has been up for two hours. Swedish is cleaner if everyone is competent and you want longer day sleeps. Do not pick Swedish because the name sounds offshore and then leave a first-timer alone at 03:00.

Ship’s time across the ocean

You will cross several zones. Keep ship’s time fixed and by the Caribbean your 04:00 watch starts in daylight. Step the clock in announced one-hour jumps and the watches stay lined up with dusk, which is what fatigue actually cares about. Rotate which watch absorbs the long or short hour. A watch rota that forgets the clocks is a rota that will wake someone late on the longest night.

Write the step dates before you leave. “We’ll see how we feel” is how one pair takes every clock change.

The first three nights

Everyone is still on marina time. The first night is excitement. The second is ugly. The third is when the rota either becomes the culture or becomes an argument. Do not change system on night two because people are moaning. Do change it if someone cannot sleep in their allotted block or cannot be left on deck. Rebuild at a day boundary and brief it once.

Seasickness on an Atlantic start is common. Mark people unavailable rather than “see how they go” for three watches. The log should show it. See crew fatigue.

ARC and rally specifics

Rally boats have extra radio nets, social pressure, and a wide mix of experience. Standing orders still need numbers — wind, visibility, traffic — not “call if you’re worried”. The net does not stand your watch. Your standing orders do.

Provisioning, safety brief and documents are the rest of the passage plan. The rota is the part crews still leave until the marina party. Do it first. Passage planning checklist.

DeckVakt will build the Atlantic rota for your named crew, project ten days of sleep debt, step the clocks, and run the board with no signal for the two weeks you will not have any.

Questions skippers ask