InterMoor has designed and decommissioned multiple mooring systems for CALM buoys. To design and deliver a CALM Loading Buoy Mooring system, our engineering team will need:

Information on the site:

  • Site survey showing bathymetry and all subsea infrastructure and hazards. Our own MoorVision software can provide a visual interface with BOEM data in the Gulf of Mexico.
  • Metocean data
  • Soils data

Information on the CALM Loading Buoy itself:

  • General arrangement drawings
  • Mooring equipment and connector information (chain stopper and padeye arrangements, configurations, capacities, etc.)
  • Stability report (buoy’s mass, centers of gravity, buoyancy, draft, metacentric height, mooring and loading hose loads, etc.)
  • Transported fluids characteristics expected to be off loaded from trading vessels and tankers
  • Operating information (how the buoy is expected to be operated and maintained during normal operating and survival conditions, frequency and duration of fluid offloading operations, etc.)

Information on the trading vessels:

For dynamic loads and affects on the CALM buoy to be simulated and accounted for appropriately, and to determine if DP system black-outs and drive-offs should be considered in the design, we will need to know the:

  • Sizes and types of trading vessels that are expected to utilize the CALM buoy
  • Maneuverability capabilities (DP or not, etc.)
  • Vessel mass properties and draft information

Information on the installation vessel:

Knowing which vessel(s) is planned to install the CALM buoy will allow us to acquire their specifications, determine their capabilities and capacities (e.g., chain and wire storage, winch capacities, etc…), and design the mooring system in a way that maximizes efficiency during mobilization, installation and CALM buoy hookup operations.

Finally, we need the regulatory and classification authority requirements, including the name of the regulatory authority expected to class the CALM buoy and its mooring system (e.g., DNV GL, American Bureau of Shipping, Lloyd’s of London, etc…) so that we can efficiently plan our work and generate reports that contain the information they will require for approval.