Lying Ahull and Running Off

Storm Tactics · Offshore Safety

Lying ahull and running off occupy opposite ends of the storm tactics spectrum in one important sense: lying ahull requires almost no action — sail down, helm lashed, crew below — while running off is an active, continuous choice that demands steering attention or a reliable self-steering device. What they share is that both tend to be tactics of last resort, and both have specific conditions under which they become dangerous in ways that a crew must understand before relying on either.

Understanding why lying ahull fell out of favor as a recommended tactic requires understanding something about how boats capsize in breaking seas. It is also worth noting the modern storm tactics hierarchy — the sequence of decisions that good offshore seamanship produces — because lying ahull and running off are at the bottom of that hierarchy, not because they are always wrong, but because better options usually exist and should be exhausted first.

Lying Ahull: What It Is and Why It Was Once Popular

Lying ahull means taking all sail off the boat, lashing the tiller or wheel to leeward, and allowing the boat to drift broadside to the wind and sea with the crew below and the hatches secured. It requires no active management — the boat looks after itself — and on a heavy displacement boat in moderate conditions, it can actually be quite comfortable. The boat rolls with the sea rather than fighting it, and the motion below can be easier than sailing hard in heavy weather.

Before the 1979 Fastnet Race and the research into capsize dynamics that followed it, lying ahull was recommended in seamanship manuals as a viable heavy weather tactic. The intuitive appeal is obvious: if conditions are too severe to sail, take down all sail and wait it out. Experienced sailors reported doing it successfully. It had a long tradition.

The problem that the Fastnet research and subsequent studies identified is this: lying ahull presents the widest part of the boat — the beam — to the most dangerous element of storm seas. A breaking crest, not merely a steep wave but an actively collapsing wall of aerated water, can apply a near-instantaneous lateral force to a broadside boat that exceeds its righting moment. This is how offshore boats capsize in heavy weather: not from sustained heeling in high winds, but from the short, violent, lateral impact of a breaking crest hitting the hull. Lying ahull maximizes exposure to exactly this risk.

When Lying Ahull Might Be Acceptable

The preceding does not mean lying ahull is never appropriate. There are specific conditions where it remains a defensible choice.

In steep but non-breaking seas, the capsize risk from lying ahull is much lower. Breaking seas are the critical variable. If a storm has produced a very large swell that is not yet breaking — common in the early stages of a rapidly deepening system — lying ahull may be genuinely acceptable for a short period while the crew rests and the boat is prepared for conditions to worsen. The moment the sea state moves to actively breaking crests, this calculus changes.

Very small boats sometimes have no practical alternative. A boat too small to deploy a sea anchor effectively or to maintain control while running off under a storm sail may have lying ahull as its only option. Smaller designs that are very heavily built and have correspondingly high righting moments may tolerate a knockdown without capsizing. This is an argument for very specific boat types and circumstances, not a general endorsement.

Waiting for dawn before making an approach to a potentially dangerous lee shore — not running off into the unknown, but staying as stationary as possible until visibility allows a safe entry — can be a legitimate reason to accept the risks of lying ahull for a limited period. This is a navigation decision made with full awareness of the capsize risk, not a comfortable choice, but sometimes a necessary one.

Running Off Under Bare Poles

Running off means bearing away from the wind and sailing or motoring in the same direction the storm is pushing you. Under bare poles — no sail set at all — many boats make 4 to 6 knots in gale conditions from wind pressure on the rig and hull alone. This is often too fast for safety in breaking seas, where surfing down a wave face at high speed and then encountering the back of the next wave can produce a broach or pitchpole.

The stern-to orientation that running off produces is inherently safer than lying ahull in breaking seas — the stern is narrower than the beam, and the boat's directional stability is better when moving forward than when broadside and stationary. But speed control is essential. An uncontrolled boat running at 8 knots in breaking seas with a following sea is in nearly as much danger as one lying ahull.

The preferred solution is a Jordan Series Drogue deployed from the stern while running off — this gives you the stern-to orientation of running off with the speed control of the drogue, bringing the boat to 2 to 4 knots. If a JSD is not available, trailing warps from the stern provides partial speed control.

Running Off Under a Storm Sail

Running off under a small amount of canvas gives the helmsman or autopilot steering control that bare poles cannot provide. When running under bare poles, the boat's directional stability depends entirely on momentum and hull form — any tendency to yaw broadside must be corrected by the rudder working in the confused pressure gradient of a following sea. A small storm sail — a storm jib sheeted flat, a scrap of canvas on the inner stay — gives the helm something to work with.

The sail area required is small. Even a few square feet of canvas driving the stern provides the steering authority needed to keep the boat running square before the sea. The risk of being overpowered is real in genuine storm conditions, so this means the smallest sail available — a storm jib rather than a working jib, and certainly not a reefed genoa that catches too much wind.

Some sailors combine a small storm sail forward with trailing warps or a JSD aft, giving both the steering control of a small sail and the speed-limiting drag of a drogue. This combination can be very effective and is worth rigging in practice before it is needed in anger.

Trailing Warps

Trailing warps — coils of heavy line deployed over the stern — is the simplest form of drag device available to any boat with a dockline inventory. The warps create drag proportional to their length, diameter, and the speed of the boat through the water. A V-shaped deployment — two warps attached at the stern quarters and meeting at a point behind the boat — provides better directional stability than a single centerline warp.

Trailing warps are not as effective as a properly designed drogue. They generate less consistent drag, are more prone to surge effects, and provide less control over boat speed in very severe conditions. But they are available to any boat immediately, require no special equipment, and provide meaningful speed reduction that can make the difference between a manageable and an unmanageable run before the sea.

The amount of warp required increases with conditions. In a Force 8 gale, 50 to 100 feet of warp per side may be adequate. In survival conditions, more is needed. Pay out as conditions deteriorate and monitor speed. If the boat is still moving at 6 or 7 knots with 200 feet of warp deployed, you need a drogue — warps alone are not providing sufficient drag.

The Sea Room Requirement

Running off is only a viable tactic if there is sea room downwind. This is the constraint that eliminates running off as an option in many real-world situations: the coast, an island group, a reef, or a shoal downwind means running off carries you into danger rather than away from it.

The navigator's job in planning any offshore passage is to examine the downwind side of every potential storm position and confirm that there is adequate sea room — typically hundreds of miles — if running off becomes necessary. A passage plan that requires threading between island groups during a potential storm window, or that places the boat close to a lee shore in a forecast deterioration, is not a safe passage plan regardless of how favorable the immediate weather looks.

The best time to establish sea room is before leaving port. The question is not just "can we make the passage if conditions are favorable?" but "where will we be if conditions deteriorate badly, and what options do we have?" A passage with hundreds of miles of open ocean to leeward offers running off as a genuine option. A passage in constrained waters may not.

The Storm Tactics Hierarchy

Modern offshore seamanship has converged on a generally agreed hierarchy for storm tactics, moving from the least disruptive to the most extreme:

Reef early and repeatedly — the first and most important step, taken before conditions force it. A boat sailing under appropriate sail area in Force 6 has more options than a boat that waited too long.

Storm sails deployed — trysail and storm jib replace the main and genoa in Force 9 and above. If these are not rigged, the tactic is not available.

Heave-to — the first true heavy weather tactic, effective in conditions up to Force 10 in non-breaking seas on appropriate boats. Gives the crew rest and time to think.

Jordan Series Drogue or parachute sea anchor deployed — the survival device step, appropriate when heaving-to is no longer managing conditions safely. The choice between these two depends on boat type and available sea room.

Running off under bare poles with trailing warps — when a drogue is not available or deployment has failed, running before the sea with whatever drag can be improvised is preferable to lying ahull in breaking conditions.

Lying ahull — the last resort when all other options are unavailable or have been exhausted. Carry the specific risk of capsize in breaking seas with full awareness, minimize exposure time, and have crew harnessed and hatches secured.

The hierarchy is a framework, not a rigid script. Conditions, boat type, crew experience, available equipment, and sea room all shape which tactics are available at any given point. The goal is to move down the hierarchy deliberately — making each step as a reasoned choice before conditions force the decision — rather than arriving at lying ahull because all other options have been lost by default.

Frequently Asked Questions

Why is lying ahull no longer recommended as a storm tactic in breaking seas? Lying ahull — all sail down, helm lashed, boat drifting broadside — presents the widest part of the boat, the beam, to the most dangerous element of storm seas. A breaking crest, not merely a steep wave but an actively collapsing wall of aerated water, can apply a near-instantaneous lateral force to a broadside boat that exceeds its righting moment. This is how offshore boats capsize in heavy weather: not from sustained heeling in high winds, but from the short, violent, lateral impact of a breaking crest hitting the hull. Research following the 1979 Fastnet Race identified this mechanism. Lying ahull maximizes exposure to exactly this risk, which is why it was removed from the recommended tactic hierarchy for conditions involving breaking seas.

Under what specific conditions might lying ahull still be a defensible choice? In steep but non-breaking seas, the capsize risk is much lower — breaking seas are the critical variable. If a storm has produced a very large swell that is not yet breaking, lying ahull may be acceptable for a short period while the crew rests and the boat is prepared for worsening conditions. Very small boats with no practical alternative to deploy a sea anchor or maintain control while running off may have lying ahull as their only option if they are very heavily built with correspondingly high righting moments. Waiting for dawn before approaching a potentially dangerous lee shore can also be a legitimate reason to accept the risks of lying ahull for a limited, deliberate period.

What is running off and why does speed control make it dangerous under bare poles? Running off means bearing away from the wind and sailing or motoring in the same direction the storm is pushing you. Under bare poles — no sail set at all — many boats make 4 to 6 knots in gale conditions from wind pressure on the rig and hull alone. This is often too fast for safety in breaking seas, where surfing down a wave face at high speed and encountering the back of the next wave can produce a broach or pitchpole. The stern-to orientation that running off produces is inherently safer than lying ahull in breaking seas, but speed control is essential. The preferred solution is a Jordan Series Drogue deployed from the stern while running off, bringing the boat to 2 to 4 knots.

How do trailing warps provide speed control when running off and when are they insufficient? Trailing warps — coils of heavy line deployed over the stern in a V-shape from the stern quarters — create drag proportional to their length, diameter, and the boat's speed through the water. They provide meaningful speed reduction immediately using existing dockline inventory with no special equipment. However, trailing warps generate less consistent drag than a properly designed drogue, are more prone to surge effects, and provide less control in very severe conditions. In a Force 8 gale, 50 to 100 feet of warp per side may be adequate. If the boat is still moving at 6 or 7 knots with 200 feet of warp deployed, a Jordan Series Drogue is needed — warps alone are not providing sufficient drag.

What sea room is required before running off becomes a viable storm tactic? Running off is only viable if there is adequate sea room downwind — typically hundreds of miles — with no coast, island group, reef, or shoal in the run-off direction. This constraint eliminates running off as an option in many real-world situations. The navigator's job in passage planning is to examine the downwind side of every potential storm position and confirm adequate sea room. The best time to establish sea room is before leaving port, not when a storm has developed. A passage with hundreds of miles of open ocean to leeward offers running off as a genuine option; a passage in constrained waters may not, regardless of how favorable immediate weather appears.

What is the modern storm tactics hierarchy and where do lying ahull and running off fit within it? The modern offshore seamanship hierarchy moves from least disruptive to most extreme: reef early and repeatedly (before conditions force it); storm sails deployed in Force 9 and above; heave-to (effective up to Force 10 in non-breaking seas on appropriate boats); Jordan Series Drogue or parachute sea anchor deployed when heaving-to no longer manages conditions safely; running off under bare poles with trailing warps when a drogue is unavailable; lying ahull as the last resort when all other options are unavailable. Lying ahull and running off are at the bottom of this hierarchy not because they are always wrong, but because better options usually exist and should be exhausted first.