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Calm Buoy (1 Unit)

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ID: 183006120
Quantity: 1 Calm Buoy
Manufacturer: IMODCO(SBM)
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Being sold "AS IS, WHERE IS". Buyer is responsible for shipping and handling.

# of Bids: 1 PLACE A BID
Product Location: Europe
End Time: Bid As Soon As Possible
Time Remaining: Bid As Soon As Possible
Trader: Elvin Kostrzewa   +1 832 426 2283ASK A QUESTION

Seller Description


 Year of Build: it was bought new and was installed in 2006, having started operations in August 2006.

 Class Status: POSA / RIPRO, with valid certificate until December 2025.

- The CALM buoy is fit to work with the following vessel types: Aframax, Suezmax and VLCC’s

- The CALM buoy weight is 390 tons


  • Diameter 12,0 mt
  • Inside Diameter 3,552 mt
  • Diameter of Outer Skirt 16,8 mt
  • Buoy Body Height 6,5 mt


The equipment identified in the following list are only the main elements, not representing their entirety.

Turn Table (Main Roller Bearing)

Discharge System

  • Floating Hoses (16" / 24") Trelleborg manufacturer
  • Submarine Hoses (16") Dunlop manufacturer
  • MBC (Marine Breakaway Coupling) used only on floating hoses strings · PLEM (Pipeline End Manifold) located at 32m depth
  • Sealine (40") with 3.2 Km length

Mooring System

  • Chafe Chains - already removed ashore
  • Support Buoys -already removed ashore
  • Mooring Hawsers - already removed ashore · Mooring Bridle n? in place

The Mooring System(anchored 12 chains)

· 6 groups of 2 anchor legs with links between 107 and 178 mm and 355/435 meters long fitted in circle and linked lo 12 MAG anchor type with a weight of 12 up to 27 tons each.

Hydraulic System for PLEM valves operation with one umbilical from the buoy body until the PLEM valves, attached to the south submarine string hoses.

o Sealine Cathodic Protection System and Buoy Body.

This is a CALM (Catenary Anchor Leg Mooring) type. It is a cylindrical buoy anchored by a system of 12 chains connected to an anchor MAG type, and high capacity moorings, allowing the movement of the buoy within certain limits and with the capacity for its replacement in the theoretical position, with high elasticity and energy absorption capacity.


  • Diameter of the monobuoy..................12,0 m
  • Inner diameter .............................3,552m
  • Outside skirt diameter .......................16,8 m
  • Body height ...........................6,5m

The buoy body consists of an outer structure and an inner cylindrical structure connected by top and bottom faces forming a welded structure, which is internally divided into bulkheads in 12 watertight compartments, 6 of which are upper and 6 lower separated by a horizontal bulkhead. such that even if two adjacent compartments are flooded, the buoy will survive.

The lower part of the buoy's body is equipped with a skirt that accommodates 6 pipe- chains with glands and jaws, each aligned with a bulkhead or frame. At the top of the float is a machined support structure for the main bearing. The skirt acts as a buoy hull defense. In addition, it reduces roll, stern-bow and Port&Starboard movements.

Two man-made passages allow access to stairs that going down through the central well at deck level to a central platform welded inside the central well, thus allowing access to the valves of the product piping. This platform is provided with a non-slip fiberglass floor and gives access to the HPU unit and telemetry equipment.

The critical components of the monobuoy, such as the main bearing, were built to withstand immersion situations and, therefore, the buoy was designed to withstand significant inclinations due to mooring forces and movements caused by waves.

Each buoy compartment has the following components:

  • A hatch bolted to the deck for the lower compartments and hatches with locks for the upper compartments.
  • A steel ladder to the bottom of the upper compartment
  • A sounding tube.
  • A support for the bilge pump.

One of the compartments has an enlarged hatch that houses the hydraulic control system for the PLEM valves and telemetry and can be used for equipment storage purposes. The compartment 6 has a recess that allows the batteries to be accommodated. The inner central compartment is formed by curved bulkheads that limit the radial compartments and the floor and roof are made of the deck plate. This compartment provides additional buoyancy and incorporates the following equipment:

  • The HPU hydraulic unit
  • The fixed telemetry unit
  • 2 manhole
  • Steel stairs

This central chamber also accommodates 2 sections of 16" pipelines for product passage with two 16 " ball valves, manually operated. These pipelines connect the underwater hoses to the central part of the swivel.

Mooring Points - On the deck around the monobuoy and aligned with the structural bulkheads there are 6 bollards for mooring speedboats and support boats. The bollards have a SWT of 15T.

Fixation / Rotation Points - At the top of the float there are 6 eyes that can be used to rotate the plate or to keep it in a certain position. Another 6 eyes are welded to the turntable. Notebooks are used to move the plate to the required position.

Fender - The buoy is protected by a 10"tubular steel fender across the perimeter of the skirt, 48 half-rod bars approximately 76 mm in diameter around the buoy body and an 8i? diameter steel tube placed the entire perimeter of the top of the buoy.

The CALM buoy was removed and docked in the port.

The seller has also the below list of spares parts that can be sold along with the Calm Buoy.

1 Trelleborg Floating Hose 2nd off the buoy 24" dual Carcass 2
2 Trelleborg Floating Hose Main line 24" dual Carcass 11
3 Trelleborg Floating Hose Tail 16" dual Carcass 4
4 Trelleborg Floating Hose Tanker rail 16" Dual Carcass 2
5 Dunlop Submarine Hose 10,67 M X 16" TYPE 551 L Double Carcass 2
6 Dunlop Submarine Hose 12,19 M X 16" TYPE 552 L Double Carcass 2
7 Out Board Pipe Swivel 24” with Stoppers -Imodco Design 1
8 24” PLEM Ball Valve with compatible actuator to operate underwater (32mt depth) 2
9 Mooring Hawsers - 16” 55mt on teh double, 110 mts periphery circular braided nylon hawser grommet rope (NDBS 704 tons) 2
10 OCIMF Chafe Chain A – 7.5 m Per OCIMF 2007, with (not less than) 24 commons links, lenght approx(not less) 7,5m 4
11 Shackle SWL 130Tons 4
12 Studbolts & Nuts for 2 complete Trelleborg Floating Hoses Strings 1
13 Studbolts & Nuts for 2 complete Dunlop Submarine Hoses Strings 1
14 Camlock 16” with CAMS 2
15 MMC BUNA O’rings for Camlock 16” 14


Seller Terms

  • Salvex and the seller have the right to reject any and all offers.
  • This product is sold AS IS, WHERE IS.
  • Buyer is responsible for all taxes, duties, loading and freight charges.
  • Seller does not offer any warranties or manufacturer warranties.
  • Upon receipt of cleared funds, Seller will provide the Buyer a Release Order for item pick up. Title transfers from Seller to Buyer upon issuance of the Release Order.
  • It is Buyer's responsibility to verify quantities and condition at the time of pick up. Once the product has been removed from Seller's location, there will be no adjustments based on quantity or condition.

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