Surface Buoy Systems

The Guardian Series

Mooring Systems, Inc. manufactures a wide range of surface buoys designed for use as meteorological and oceanographic instrumentation platforms.

Our unique Guardian design incorporates durable self fendering hulls made of Surlyn foam. Surlyn foam is closed cell, extremely tough, and requires little maintenance.

A galvanized steel frame and footed base provides a reliable construction that places the buoy system in compression while moored.

A lightweight aluminum tower will support a host of instrumentation, solar panels, and navigation lights.

The central well has a watertight compartment available for mounting batteries or electronics, and a removable topside end-cap allowing access while moored.

Our versatile design approach allows for custom designed towers and instrument mounting for many inshore and offshore applications.

  • Features:
  • Rugged Self-Fendering Surlyn Foam Hull
  • Lightweight Aluminum Tower (Removable)
  • Integral Radar Reflector
  • Watertight Battery / Electronics Compartment

  • Steel Frame, Well, & Base
  • Lifting & Handling Bails
  • Self-Standing Base (For Some Models)

  • Options:
  • Instrumentation Mounting Brackets
  • Bi-Moor or Tri-Moor Attachment Bails

  • Custom Well Or Tower Fabrication
  • Hull Stenciling
  • Light

Guardian Series Specifications:

ModelG-1000G-2000G-3000G-5000
Net Buoyancy (lbs.)1000
(454 kg)
2000
(907 kg)
3000
(1360 kg)
5000
(2268 kg)
Surlyn Hull Diameter61"
(1549 mm)
61"
(1549 mm)
82"
(2082 mm)
82"
(2082 mm)
Surlyn Hull Height16"
(406 mm)
24"
(610 mm)
24"
(610 mm)
42"
(1067 mm)
Tower
Height
72"
(1829 mm)
82"
(2083 mm)
82"
(2083 mm)
94"
(2388 mm)
Well
Depth
46"
(1168 mm)
54"
(1372 mm)
54"
(1372 mm)
88"
(2235 mm)
Well Inside Diameter12"
(305 mm)
12"
(305 mm)
12"
(305 mm)
12"
(305 mm)
Base
Height
32"
(813 mm)
32"
(813 mm)
32"
(813 mm)
48"
(1219 mm)
Overall Height w/o Light10'
(3.1 m)
11.5'
(3.5 m)
11.5'
(3.5 m)
15.3'
(4.7 m)
Air Weight Estimate (lbs.)775
(350 kg)
850
(386 kg)
1200
(545 kg)
2000
(907 kg)
  • Construction:
  • Buoyancy Hull: Surlyn Foam
  • Well / Frame: Steel, Zinc Protected, Aluminum Construction Available
  • Tower: 6061-T6 Aluminum
  • Hardware: 316 Stainless Steel
  • Isolation Bushings: Nylon
  • Top-Side Paint: Yellow Or White
  • Bottom Paint: Anti-Fouling Below Waterline
  • Mooring Attachment: Bail On Well Bottom For Single Point Mooring

If you have any questions, feel free to contact us.

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Model G-2000 surface buoy manufactured by MSI

Above: Model G-2000 surface buoy manufactured by MSI

Watertight compartment end-cap

Above: Watertight compartment end-cap

Surface buoy steel well & base

Above: Surface buoy steel well & base

Surface buoy integral radar reflector
Surface buoy bi-moor lower bail

Above Left: Surface buoy integral radar reflector
Above Right: Surface buoy bi-moor lower bail

MSI has extensive deployment & recovery experience at sea
G-2000 & G-3000 surface buoys manufactured by MSI

Above Left: MSI has extensive deployment & recovery experience at sea
Above Right: G-2000 & G-3000 surface buoys manufactured by MSI

More photos are available in the photo gallery

Small Surface Buoys

The Guardian Series

Mooring Systems, Inc. manufactures a range of smaller surface buoys designed for use as meteorological and oceanographic instrumentation platforms or as markers.

These buoys incorporate durable self-fendering hulls made of Surlyn foam.

Surlyn foam is closed cell, extremely tough, and requires little maintenance.

A lightweight aluminum mast can be made to support instrumentation, solar panels, and navigation light.

A central well with a watertight compartment is available for mounting batteries or electronics.

  • Features:
  • Rugged Self-Fendering Surlyn Foam Hull
  • Lightweight Aluminum Mast (Removable)
  • Integral or Removable Radar Reflector

  • Watertight Battery / Electronics Compartment (Not Used on Spar Buoy S-200)
  • Steel or Aluminum Well Construction
  • Lifting & Handling Bails

  • Options:
  • Marine Light
  • Instrumentation Mounting Brackets
  • Solar Panel Frames

  • Bi-Moor Attachment Bail
  • Custom Well or Tower Fabrication
  • Hull Stenciling

Guardian Series Specifications:

ModelS-200GB-200G-300G-400G-500G-700
Net Buoyancy200 lbs.
(90 kg)
200 lbs.
(90 kg)
300 lbs.
(136 kg)
400 lbs.
(181 kg)
500 lbs.
(227 kg)
700 lbs.
(317 kg)
Surlyn Hull Diameter20"
(50 cm)
34"
(86 cm)
34"
(86 cm)
48"
(122 cm)
48"
(122 cm)
48"
(122 cm)
Surlyn Hull Height36"
(91 cm)
8"
(20 cm)
12"
(30 cm)
10"
(25 cm)
12"
(30 cm)
16"
(40 cm)
Mast
Height
60"
(152 cm)
36"
(91 cm)
36"
(91 cm)
48"
(122 cm)
60"
(152 cm)
Well
Depth
41"
(104 cm)
41"
(104 cm)
36"
(91 cm)
40"
(102 cm)
44"
(112 cm)
Well Inside Diameter6"
(15 cm)
6"
(15 cm)
12"
(30 cm)
12"
(30 cm)
12"
(30 cm)
  • Construction:
  • Buoyancy Hull: Surlyn Foam
  • Well / Frame: Steel or Aluminum, Zinc Protected
  • Tower: 6061-T6 Aluminum
  • Hardware: 316 Stainless Steel
  • Isolation Bushings: Nylon
  • Top-Side Paint: Yellow Epoxy Paint
  • Bottom Paint: Anti-Fouling Below Waterline
  • Mooring Attachment: Bail On Well Bottom For Single or Dual Mooring

If you have any questions, feel free to contact us.

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G-700 surface buoy
G-400 surface buoy

Above Left: G-700 surface buoy manufactured by MSI
Above Right: G-400 surface buoy manufactured by MSI

S-200 Spar surface buoy
GB-200 surface buoy

Above Left: S-200 Spar surface buoy manufactured by MSI
Above Right: GB-200 surface buoy manufactured by MSI

MSI G-400 surface buoy deployed in Tahiti

Above: MSI G-400 surface buoy deployed in Tahiti

More photos are available in the photo gallery