Why a Buoy Beats the Anchor on Many Coastal Stops

Around the UK coast, the mooring buoy is one of the quietest bits of seamanship you'll practise. In Falmouth, the Dart, the Clyde, Chichester Harbour or the Menai Strait, a visitor buoy costs a fraction of a marina berth, keeps your anchor stowed, and leaves the seabed undisturbed. It also means you can arrive at dusk, pick up a line and be drinking tea before the anchor chain has even thought about rattling out.

But a buoy is somebody else's kit, sitting in salt water for years, and you're about to hang several tonnes of boat from it. Understanding what you're attaching to — and how to attach to it properly — turns a nerve-racking manoeuvre into a calm one.

Types of Mooring You'll Meet Afloat

Not every floating object is a mooring, and not every mooring is a visitor mooring. The common ones:

• Swinging mooring — a single riser chain from a concrete sinker, ground screw or old engine block. The boat swings through a full circle. Common in estuaries and bays.
• Trot mooring — a line of buoys along a ground chain, used where space is tight, such as the Itchen or parts of the Tamar. You pick up the buoy assigned to you and lie fore-and-aft.
• Fore-and-aft trot — two buoys, bow and stern, maintaining a fixed heading. Often harbour authority run.
• Visitor or harbour buoy — usually maintained by the harbour authority or a club, with a pick-up line and often a small pennant. Fees are commonly collected ashore.
• Private and club moorings — sometimes marked "vacant" or left available by arrangement. Assume the owner will return.
• Not moorings at all — lobster pot markers, string lines of creels, racing marks, and small dan buoys. Never pick one up. Pot lines are buoyant, cheap and very willing to wrap your propeller.

Loads, Risers and What the Buoy Can Really Take

A mooring's safe working load is set by its weakest link, and that is rarely the big buoy. Look at the whole system: riser chain, swivel, shackles and the sinker below. A typical yacht mooring uses 12–16mm chain with a breaking strength in the region of eight to ten tonnes, but a worn swivel or a shackle pin without mousing can halve the real safety margin. A two-tonne working load is about the norm for a 28–32ft yacht on a well-maintained swinging mooring.

Static load is only half the story. In a wind-against-tide chop or an Atlantic swell, a five-tonne boat can generate snatch loads of two or three tonnes, repeatedly, all night. Rope risers degrade under ultraviolet light and chafe on the sinker; chain wears at the seabed and at the swivel. If a buoy has no visible ring, a frayed pick-up line, or sits noticeably low in the water, treat it as unfit and move on.

Picking One Up Without Drama

Prepare before you arrive. Rig a dedicated mooring line outside the guardrails, led through a bow fairlead, inboard end made fast on a bow cleat with a few turns. Keep one crew forward with a boathook, briefed, and keep the helm quiet.

• Read the set — decide whether wind or tide will dominate, and approach into whichever is stronger. Come in at a knot or less, with enough way to steer.
• Take the pick-up line first where one exists. Lift the small float aboard, or use the boathook to hook its line, and control it hand over hand. Never drag it through the water under power.
• Thread your own line through the buoy's ring rather than lassoing the buoy body. A line around the buoy itself chafes against the moulding and can jam.
• Make fast, then test — bring the line back to the cleat, take up slack, and apply a gentle astern burst. If the buoy starts to tow under, you'll see it immediately.
• Don't lift the buoy aboard to inspect it, and don't stand on it. Buoys are slippery, and some are barely buoyant enough for their own chain.

Protecting Your Boat and the Seabed

Once secured, soften every snatch you can. A nylon snubber or a long, stretchy warp led to the bow roller absorbs the shock that would otherwise go through your cleat. Add a plastic anti-chafe sleeve, a length of hose or a leather patch where the line passes the fairlead, and check it each morning — a wind shift overnight can find a new wear point.

Use the buoy's own swivel if it has one; if not, a snubber with an integrated swivel stops your line winding up as the boat swings. Keep the rode short enough that you don't swing into a neighbour, but long enough to avoid snatching.

On the seabed, the choice of a buoy over an anchor is itself the greener option. Moorings concentrate wear on a small footprint and spare fragile habitats such as eelgrass and maerl. So don't drop your anchor on top of a mooring, don't drag chain across a seagrass bed, and don't run your own line across the ground when leaving.

Before You Trust It, and When You Leave

Do a slow walk-round at low water if you can. Check the riser where it meets the buoy, look for mousing wire on shackles, and note whether the buoy is listed, sitting low, or carrying someone else's abandoned line. At night, a torch and a reflective patch help you find the ring — and help others see your boat.

If you go ashore, pay the fee, ask the harbour office about the buoy's condition, and leave the pick-up line floating clear rather than coiled on deck. On departure, cast off with the boat settled, motor gently clear, and let the line fall back into the water rather than over your propeller. Do that and the next boat along will find the mooring exactly as you did — which is the whole point of shared coastal kit.