What Is Pick Up Buoy? Definition, Types, Construction & Offshore Uses

Pick Up Buoy

A pick up buoy is a small, highly visible floating device attached to a mooring line, chain, rope, or subsea messenger line to make retrieval easier. In harbors it helps boat crews hook the mooring pendant; in offshore SPM and subsea projects it marks and recovers submerged mooring ends, hoses, umbilicals, or cables.

Unlike a big general surface support buoy that carries heavy chain tension, a pick-up buoy is usually lighter, easier to grab by hand or boat hook, and often used for marking + retrieval rather than primary load support.

Quick Answer

A pick up buoy is a marine float attached to a mooring line or chain end so crews can locate, hook, and pull the line to the vessel. Offshore versions are foam-filled and unsinkable; recreational/marina versions are often UV-stable PVC with a grab handle.

What Is a Pick Up Buoy?

A pick up buoy is the “handle” of a mooring system.

Instead of searching the water for a sunk pendant or submerged chain, the crew sees the bright float, reaches it with a boat hook, and pulls the main mooring line aboard.

Two main worlds use the same name:

1. Harbor / yacht mooring pick-up buoy – small PVC or foam ball with a pennant line and grab handle.
2. Offshore / SPM pick-up buoy (PUB) – foam-filled PE/EVA core, PU skin, internal steelwork, swivel or pad eye, used in single point mooring, dredging, cable lay, and subsea operations.

How Does a Pick Up Buoy Work?

Cylindrical Buoy

The principle is the same in every case:

1. A light line or thimble connects the pick-up buoy to the main mooring pendant / chain / messenger rope.
2. The buoy floats at the surface and shows the line position.
3. The vessel approaches slowly.
4. Crew hooks the buoy with a boat hook or grabs the handle.
5. The main pendant is pulled aboard and secured to the bow cleat / mooring winch.
6. In offshore use, the PUB may also keep a messenger line partially suspended and protect it from seabed chafe.

Types of Pick Up Buoys

1. Recreational / Marina Pick-Up Buoy

• Marine-grade UV-resistant PVC
• Integral top handle or thin fiberglass rod
• Reinforced eye / thimble
• Red, yellow, orange
• Used for visitor moorings, diving markers, lobster-pot-style retrieval

2. Foam-Filled Offshore Pick-Up Buoy (PUB)

• Closed-cell PE / EVA foam core
• Polyurethane elastomer skin
• Central steel tube, gussets, load flanges
• Swivel, clevis eye, pad eye, chain plate
• Used in SPM, cable lay, dredging, aquaculture, subsea survey

3. Spherical / Oval Pick-Up Marker

• Low drag in waves
• Easy to see from bridge
• Good for temporary marker / ROV umbilical end / scientific mooring

4. Pick-Up Buoy With Messenger Line

• Small float + light rope
• Lets divers or workboats recover a submerged end without dragging the whole scope

Pick Up Buoy vs General Surface Support Buoy

Offshore Pick Up Buoy Construction

A proper offshore PUB is built like a mini support buoy:

Closed-Cell Foam Core

PE or EVA foam, thermo-laminated. If the skin is cut, water does not enter and the buoy stays afloat.

PU Elastomer Skin

Sprayed polyurethane, often nylon/polyester reinforced. Resists abrasion, UV, seawater, fatigue.

Internal Steelwork

Central tube + gussets + load-distribution flanges. SWL comes from steelwork, not foam.

End Fittings

• Pad eye
• Clevis eye
• Swivel
• Thimble + shackle
• Chain locking plate
• Single locking pin

Where Pick Up Buoys Are Used

• Yacht/visitor moorings
• Diving markers
• Single Point Mooring (SPM) systems
• Subsea cable / umbilical / hose retrieval
• Dredging discharge hose marking
• Aquaculture cage mooring
• Survey instrument recovery
• Salvage and temporary offshore moorings

Benefits of Foam-Filled Pick Up Buoys

✅ Unsinkable after puncture

✅ Bright color = high visibility

✅ Light enough for manual handling

✅ Optional swivel reduces line twist

✅ Low maintenance vs inflatable buoys

✅ Custom net buoyancy, fittings, color

✅ Safe retrieval by hand, boat hook, or winch

How to Specify a Pick Up Buoy

Send suppliers this list:

1. Application: marina / SPM / cable lay / dredging
2. Net buoyancy required (kg or lbs)
3. Line type: rope / chain / hose / umbilical
4. Chain diameter and grade
5. Diameter × length
6. Foam: PE / EVA
7. Skin: PU / nylon-reinforced PU
8. Steel finish: hot-dip galvanized / coal-tar epoxy
9. End fitting: swivel / pad eye / clevis / thimble
10. Color: orange / yellow / red
11. Certs: ISO / BV / ABS / LR / CCS

Rule of thumb: a pick-up buoy does not need the same SWL as a chain-through buoy. Size it for visibility + messenger-line tension + recovery load, not full mooring chain tension.

FAQ

What is a pick up buoy used for?

It marks and retrieves a mooring line, chain end, hose, or subsea messenger line so crews do not have to search underwater.

Is a pick up buoy the same as a mooring buoy?

No. A mooring buoy is the main float a vessel ties to. A pick-up buoy is the small retrieval aid attached to the pendant.

Are offshore pick up buoys unsinkable?

Foam-filled PUBs usually are. Closed-cell PE/EVA foam keeps buoyancy even if the PU skin is punctured.

What color should a pick up buoy be?

Bright orange, yellow, or red for visibility. Some terminals use client-specific colors with letter/number marking.

Can a pick up buoy be customized?

Yes—buoyancy, diameter, fittings, swivel, reflective tape, markings, and steel coating are all customizable

Conclusion

A pick up buoy is the simplest but most useful retrieval device in any mooring system: small enough to grab, bright enough to see, and—in offshore form—foam-filled, steel-reinforced, and unsinkable. Whether for a harbor visitor mooring or an SPM terminal, it turns “where is the line?” into “hook it and pull.”

For recreational use, choose UV-stable PVC with a handle. For offshore use, choose closed-cell foam + PU skin + certified steelwork.