Singlehanded Passage Preparation

Solo Sailing · Passage Planning

A solo passage amplifies every preparation gap. On a crewed boat, a missing spare part is an inconvenience that someone else might solve; on a solo boat at sea, it is a problem that falls entirely to you, at whatever hour it manifests, in whatever conditions are running. The effect is not linear — the gap between a well-prepared solo passage and a poorly prepared one is not the same as the gap between a well-prepared crewed passage and a poorly prepared one. Alone, the consequences of inadequate preparation compound in ways that are difficult to appreciate until you are in the middle of them.

Experienced singlehanders spend more time on pre-departure preparation, not less, than crewed sailors with the same offshore experience. This is not timidity. It is the recognition that the systems, the provisioning, the communications, and the mental framework that a crew distributes among its members must all be fully resolved before a solo sailor leaves the dock, because there will be no one to resolve them afterward.

Autopilot: The Singlehander's Engine

The autopilot is not optional equipment for a singlehanded offshore passage. It is the system that makes the passage possible by steering the boat while the sailor sleeps, eats, repairs things, and navigates. An autopilot that fails offshore is not an inconvenience — it ends the passage, or forces hand-steering in shifts that are not sustainable for a single person over days.

The most common autopilot mistake on production boats is undersizing: the autopilot drive unit is matched to the boat's length rather than its displacement and steering loads. A full-keel 40-footer with a displacement of 22,000 lbs requires substantially more drive force to maintain course in following seas than a light-displacement 40-footer at 14,000 lbs. The autopilot specifications that describe a unit as "suitable for boats to 45 feet" do not account for this variation. Size to displacement and to the conditions you expect to encounter. For offshore, err toward the heavier-duty unit.

The Simrad AP44 and B&G Triton autopilot systems are among the most commonly specified for offshore singlehanding in the 38–52 foot range, primarily for their reliability under sustained load and their integration with chartplotter networks. For boats with mechanical steering rather than hydraulic, a mechanical drive unit is simpler and more repairable at sea. The tillerpilot — a simple electric unit that pushes the tiller directly — is an excellent backup for wheel-steered boats and the primary system for tiller-steered boats offshore. Carry a spare autopilot motor at minimum; the drive belt (where applicable) and the course computer as well if the budget allows.

The windvane self-steerer as a backup is the serious offshore singlehander's answer to autopilot failure. A windvane requires no electricity, has no electronics, and steers the boat to a wind angle indefinitely as long as there is wind. The Monitor and Hydrovane are the production designs with established offshore track records. Fitting a windvane to a passage boat is a significant commitment of time and expense; for boats that will make extended offshore passages, it is one of the most defensible equipment investments available.

Passage Provisioning Solo

Solo provisioning differs from crew provisioning in ways that go beyond simple quantity reduction. The key difference is that on a solo boat, every meal is prepared by the same person who is also standing watch, navigating, making sail adjustments, and potentially managing deteriorating conditions simultaneously. This is not a problem of preference — it is a problem of load management.

The practical answer is one-handed, one-step meals. Pre-cooked food that can be eaten cold from the container if the stove cannot be managed. Hot drinks that can be made from a thermos or single-burner kettle without requiring two hands. Caloric density matters more than variety: a solo sailor in cold conditions or heavy weather burns significantly more calories than the same person sitting at a desk, and maintaining caloric intake is important for sustained cognitive function and decision-making quality. The exhausted, underfed solo sailor makes worse decisions — a fact that is obvious in principle and surprisingly easy to overlook in practice when eating feels like low priority compared to managing the boat.

Pre-positioning food in accessible locations matters. The grab-and-eat system — food stored within reach of the companionship, in containers that can be opened with one hand, in quantities that do not require preparation — is the standard in offshore singlehanding. Hot meals when conditions allow; cold food when they do not. A thermos of hot water prepared before a rough night gives the option of instant coffee or soup at 0300 without requiring a trip to the stove with the boat moving hard. Small planning details like this accumulate into the difference between a sustainable passage and a depleting one.

Weather Routing for the Solo Sailor

The solo weather window is substantially more conservative than the crewed window for the same passage. The standard rule of thumb — add 20 knots to your crewed comfort threshold — exists because the conditions that a crew of three can manage in rotation, with one person sleeping while two handle a deteriorating situation, are qualitatively different from the same conditions managed by one person who has already been awake for eighteen hours.

The decision to divert is harder alone. On a crewed boat, the conversation about whether to put into a port of refuge or press on is a shared one; the consensus provides a check on the natural tendency to minimize developing weather when you are committed to a passage. Alone, the tendency to minimize is unchecked, and the decision to divert falls entirely on the solo sailor's judgment — which is most tested precisely in the conditions that most require diversion. Experienced singlehanders report developing formal decision frameworks in advance: if the wind forecast shows more than X knots for more than Y hours in the next 48, divert. The framework replaces the in-the-moment judgment call with a procedure that was established when the judgment was not under pressure.

Weather routing services — GRIB file analysis, commercial routers, the offshore weather briefings available through Saildocs and similar services — are used heavily by experienced offshore singlehanders. The cost of a commercial weather router for a significant passage is modest relative to the value of the second opinion on a decision that will be made without crew input. Many professional solo racers use routing services as a matter of course; the same logic applies to a cruising sailor on a solo ocean passage.

Communications and Check-In Schedules

A communication plan for a solo passage has two purposes: maintaining situational awareness (weather, routing updates, occasional human contact) and providing the mechanism by which someone ashore knows to request assistance if contact is lost. Both require preparation before departure.

The check-in schedule — times and frequencies at which the solo sailor will make contact with a designated person ashore — must be established and communicated before leaving the dock. What happens if a check-in is missed must also be defined: how many missed check-ins before the ashore contact calls the coastguard, and which coastguard. The schedule must be realistic given the passage — a daily check-in during an ocean crossing is sustainable; a twice-daily check-in is unnecessary and creates an obligation that becomes burdensome in heavy weather when communication is difficult.

The Garmin inReach satellite messenger provides two-way text messaging via the Iridium satellite network, a track upload at user-defined intervals, and an SOS function. It is the baseline communications device for singlehanders outside coastal VHF range — small, low-power, and reliable in conditions where SSB radio is unwieldy. SSB radio connected to Saildocs provides weather routing updates via email without satellite subscription costs, and allows participation in offshore cruising radio nets where human contact with other sailors is one of the underrated psychological benefits of a long passage. A satellite phone as backup for voice communication with the ashore contact completes the primary communications package for a serious offshore passage.

Boat Systems: The Single-Point Failures

Solo passage preparation includes a systematic audit of the systems on which the passage depends, with particular attention to single-point failures — systems for which there is no backup and the failure of which would end the passage or create a serious emergency. The list varies by boat, but the most common categories are: steering (autopilot failure and loss of manual steering); propulsion (engine failure, both for harbor maneuvering and for charging); navigation (GPS failure, chartplotter failure); bilge management (primary bilge pump failure); and electrical (alternator failure or main battery bank failure).

For each item on the list: carry a spare, know how to install it at sea, and verify that the spare works before departure. A spare autopilot motor that has never been tested is not a spare — it may be a dead unit that has been carried for three years. A handheld GPS as backup to the chartplotter is only useful if it has current charts loaded and working batteries. Paper charts for the passage area and a hand-bearing compass are the ultimate fallback for navigation and should be present on any offshore boat. A manual bilge pump accessible from the cockpit backs up the electric pump. A handheld VHF with charged batteries backs up the fixed installation.

The seacocks — every through-hull fitting below the waterline — should be located, identified, and exercised (opened and closed) before the passage. On a boat that has not had its seacocks exercised in years, some will be seized. Knowing where each one is and whether it operates is not a drill — it is the preparation that matters when a through-hull fitting fails at sea and the question of which seacock to close must be answered in under two minutes.

The Float Plan

The float plan is the document filed with a designated person ashore before departure. It is the mechanism by which a SAR response is initiated if the solo sailor does not arrive. It should be filed before leaving the dock — not transmitted mid-passage, not left for someone to find after departure. The designated ashore contact must know they have it and understand what action to take if the arrival window passes without contact.

A complete float plan includes: departure port and time; destination port and expected arrival time (with a defined tolerance — "if not arrived and not in contact by X date plus 48 hours, contact the coastguard"); intended route and waypoints; boat name, type, length, color, hull identification number, and registration; vessel MMSI number and EPIRB registration; the solo sailor's full name, date of birth, nationality, and a recent photograph; emergency contacts; and the phone number for the relevant coastguard rescue coordination center. The photograph is specifically useful for SAR operations — it allows first responders to confirm identity if the sailor is found incapacitated.

Mental Preparation: The Part Nobody Talks About

Every experienced offshore singlehander describes a recognizable psychological arc in the first week of a solo passage. The first two to three days are often characterized by anxiety — the heightened alertness of leaving, the accumulation of small problems that present themselves as soon as the coast is behind you, the adjustment to the physical demands of watch-keeping. Days four and five, in the accounts of many sailors, are described as the psychologically hardest: the shore is out of reach, the destination is not yet close, and the social texture of normal life has been replaced by complete solitude. The inner monologue becomes loud.

The experienced singlehander who has made passages before knows that this passes. The sailor on their first solo offshore passage may not. The knowledge that the psychological difficulty of the early days is normal, expected, and temporary is itself a form of preparation. Moitessier wrote about it. Knox-Johnston wrote about it. MacArthur's communications from the Vendée Globe described it in real time. The pattern is consistent enough that it can be anticipated and prepared for — not by eliminating it, but by understanding it as a transition rather than a warning.

Heavy weather is the other psychological test that preparation can address, though it cannot eliminate the experience itself. Being alone in 40 knots of wind and 4-meter seas is objectively frightening, and the absence of another person to share the fear with is a real and significant difference from crewed offshore sailing. Experienced singlehanders prepare for this in two ways: by having made the boat genuinely ready for the conditions (hove-to, reefed appropriately, jacklines rigged, hatches dogged), so that the anxiety does not have legitimate equipment concerns feeding it; and by having, in advance, thought through what they will do if the conditions deteriorate further. The decision — heave-to here, run off before the storm, seek sea room, maintain course — that is made in calm conditions is a better decision than the one made in the dark at 0300 in deteriorating weather for the first time. The preparation is the decision, made early.

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Frequently Asked Questions

How should an autopilot be sized for a singlehanded offshore passage? The most common autopilot mistake on production boats is undersizing by matching the drive unit to the boat's length rather than its displacement and steering loads — a full-keel 40-footer at 22,000 lbs requires substantially more drive force than a light-displacement 40-footer at 14,000 lbs. Autopilot specifications describing a unit as 'suitable for boats to 45 feet' do not account for this variation, so for offshore, err toward the heavier-duty unit sized to displacement and expected conditions. Carry a spare autopilot motor at minimum; for a serious offshore passage, also carry the drive belt where applicable and the course computer, and consider a windvane self-steerer as backup since it requires no electricity and steers indefinitely to a wind angle.

Why is the solo weather window more conservative than the crewed window for the same passage? The standard rule is to add 20 knots to your crewed comfort threshold, because conditions that a crew of three can manage in rotation with one person sleeping while two handle a deteriorating situation are qualitatively different from the same conditions managed by one person who has already been awake for eighteen hours. The decision to divert is also harder alone — on a crewed boat, conversation provides a check on the natural tendency to minimize developing weather, but alone that tendency is unchecked and the decision falls entirely on the solo sailor's judgment which is most tested exactly when diversion is most needed. Experienced singlehanders report developing formal advance decision frameworks: if the wind forecast shows more than X knots for more than Y hours in the next 48, divert — replacing in-the-moment judgment with a procedure established when judgment was not under pressure.

What must a solo sailor's float plan include and when should it be filed? A complete float plan must be filed with a designated person ashore before leaving the dock — not mid-passage, not left for someone to find after departure — and that contact must understand what action to take if the arrival window passes without contact. The plan should include departure port and time, destination port and expected arrival with a defined tolerance (if not arrived and not in contact by X date plus 48 hours, contact the coastguard), intended route and waypoints, boat name/type/length/color/HIN and registration, MMSI number and EPIRB registration, the solo sailor's full name, date of birth, nationality, and a recent photograph, plus emergency contacts and the coastguard rescue coordination center phone number. The photograph is specifically useful for SAR operations — it allows first responders to confirm identity if the sailor is found incapacitated.

What single-point failure systems must a singlehander audit before departure and how should they be addressed? The most common single-point failure categories are steering (autopilot failure and loss of manual steering), propulsion (engine failure for harbor maneuvering and battery charging), navigation (GPS and chartplotter failure), bilge management (primary bilge pump failure), and electrical (alternator or main battery bank failure). For each item: carry a spare, know how to install it at sea, and verify that the spare works before departure — a spare autopilot motor that has never been tested may be a dead unit carried for three years. Paper charts for the passage area and a hand-bearing compass are the ultimate navigation fallback; seacocks below the waterline should be located, identified, and exercised before departure since knowing which seacock to close must be answerable in under two minutes.

What is the psychological arc of the first solo offshore passage and how can it be prepared for? Every experienced offshore singlehander describes a recognizable psychological arc: the first two to three days characterized by heightened anxiety and adjustment to the physical demands of watch-keeping, followed by days four and five which most describe as psychologically hardest — the shore is out of reach, the destination is not yet close, and the social texture of normal life has been replaced by complete solitude. The knowledge that this difficulty is normal, expected, and temporary is itself a form of preparation — Moitessier, Knox-Johnston, and MacArthur's Vendée Globe communications all described this pattern consistently enough that it can be anticipated as a transition rather than a warning. For heavy weather specifically, the decision about what to do if conditions deteriorate — heave-to here, run off, seek sea room — made in advance during calm conditions is a better decision than the one made at 0300 in deteriorating weather for the first time.