Why Locks Deserve Your Full Attention

Locks are one of the great pleasures of canal boating. They lift you gently from one level of the waterway to another, often with a view, a bit of gossip with a passing lock keeper, and the satisfying clunk of a paddle winding shut. They are also the place where new boaters most often pick up dents, bruises and frayed nerves. The good news is that lock work is simple when it is done slowly and in the right order. The bad news is that water is heavy, ropes can bite, and a moment of rushed movement can turn a calm passage into a genuine hazard.

This guide is for anyone new to narrowboating, whether you are hiring for a week or settling into life afloat. You do not need to be strong. You do need to be methodical, to keep your hands and feet clear, and to agree with your crew what will happen before it happens.

Before You Enter: Preparation and Briefing

Approach every lock as if it is your first. Slow down well before the lock mouth, ideally on tick-over, and send one crew member ahead with a windlass to look at the controls. Check that the paddles are down and the gates are closed before you commit. If the lock is set against you, moor up on the bollards below or above and wait while it is prepared. Never assume a lock is ready because the gates look shut; a paddle may still be raised a few turns.

Brief your crew in plain language. Agree who will steer, who will work the lockside, and who will handle ropes. On a narrowboat, the person at the tiller stays at the tiller unless the boat is securely moored. Everyone else should know where the life jackets are, and children and non-swimmers should wear them on deck and on the lockside. Keep a boat pole and a throwing line within reach. Wear shoes with grip, not sandals, and avoid loose clothing that can catch on windlass or bollard.

If you are single-handed, take extra time. Use a centre line led back to the helm so you can step off with it in hand, and never jump across a gap. It is better to use a ladder and take two trips than to risk a fall.

Filling and Emptying a Lock Safely

Water enters a lock through paddles. Ground paddles let water in below the waterline and are gentler; gate paddles send water in higher up and can create a powerful surge. When you are going uphill, enter the empty lock, close the gates behind you, then open the ground paddles first. Open them slowly, a turn at a time, and watch the boat. If she begins to surge forward or sideways, pause. Once the ground paddles are fully open and the water is calm, you can crack the gate paddles if needed, but keep your hand on the windlass and your eyes on the boat.

Going downhill is the reverse. Enter the full lock, close the gates, then open the gate paddles gently. The water will drop away, so keep the boat clear of the cill at the top end and away from the bottom gates. As the level falls, the stern line may need to be eased or taken in. Never tie a boat hard to the lockside; let it rise or fall with the water while you control it with ropes.

One golden rule: keep the boat away from the cill. That is the step under the top gates. If the stern catches on it as the water drops, the boat can be tipped or held while the water pulls away beneath her. Watch the stern, and if in doubt, close the paddles and reset.

Ropes, Turns and Keeping Control

Ropes are your brakes and your steering aids in a lock, but they can also trap fingers and drag people into the water. Use a centre line and a stern line, and keep them tidy underfoot. Take a turn around a bollard, then another turn in the opposite direction, so the rope can be eased and held without knotting. Never wrap a rope around your hand, wrist or waist. If a rope starts to run, let it go and step back. You can always retrieve it once the water has settled.

Keep the engine in neutral unless you need a short burst of power to hold position, and never leave the helm unattended while the boat is in a lock. If the boat drifts, use the tiller and a gentle touch of throttle rather than pulling hard on a rope. A narrowboat weighs many tonnes; your arms will not win against moving water.

Communication That Prevents Accidents

Most lock accidents begin with a misunderstanding. Shouting across a noisy lock does not count as communication. Agree a simple plan before you start: who opens which paddle, who closes the gate, who holds the centre line, and what “stop” looks like. Use clear, short words. “Opening the ground paddle”, “Gate is closed”, “Hold her there”, “Let go the stern line”. Repeat back what you hear. If you cannot hear, use hand signals: a flat palm for stop, a circling finger for wind, a thumbs up for ready.

Do not assume the lock keeper or a helpful passer-by knows your plan. Thank them, then confirm what you want. If you are the skipper, you are responsible for your boat, even when someone else is winding a paddle.

When Plans Change: Handling Common Lock Problems

Locks can surprise you. A paddle may jam, a gate may refuse to open, or a boat may drift against the gate. If something goes wrong, stop and think before you act. Close any paddles you have opened, put the engine in neutral, and secure the boat if you can. Use your boat pole to fend off, not your hands or feet. If a person falls in, do not jump in after them. Throw a line or a buoyant item, and use the ladder to help them out. Call for help if needed, and keep the rest of your crew calm.

With practice, lock work becomes a rhythm: approach, prepare, fill or empty, move out, close up. Take your time, keep your ropes controlled, and talk to each other. The canals reward patience. Do that, and every lock becomes a small adventure rather than a source of worry.