﻿ PipeLay > Software Components & Operation > Model Setup > Additional Subcomponents > Buoy > Buoy Data Inputs

# Buoy Data Inputs

 Input Description Weight Properties Click on this button to display the Buoy – Properties dialog. See the ‘Buoy – Properties Dialog’ section for a detailed description of this dialog. Hydro-dynamic Properties Click on this button to display the Buoy – Hydrodynamic Properties dialog. See the ‘Buoy – Hydrodynamic Properties Dialog’ section for a detailed description of this dialog. Note that this button is disabled in PipeLay Starter Edition.

## Buoy – Properties Dialog

 Input Description Weight in Air: The weight in air of the buoy. Units: [kN] or [kips] Weight in Water: The weight in water of the buoy. Units: [kN] or [kips]

PipeLay models the buoy weight in air by means of a point mass at the location of the buoy. A point buoyancy is used to model the net buoyancy force equal to the difference between the weight in air and the weight in water. Specification of buoy hydrodynamic properties is optional. By default, buoy hydrodynamics are omitted.

## Buoy – Hydrodynamic Properties Dialog

 Input Description X: CdAd: The product of the buoy frontal area and drag coefficient in the X direction. Units: [m2] or [ft2] X: CmVin: The product of the buoy reference volume and inertia coefficient in the X direction. Units: [m3] or [ft3] X: CaVin: The product of the buoy reference volume and added mass coefficient in the X direction. Units: [m3] or [ft3] Y: CdAd: The product of the buoy frontal area and drag coefficient in the Y direction. Units: [m2] or [ft2] Y: CmVin: The product of the buoy reference volume and inertia coefficient in the Y direction. Units: [m3] or [ft3] Y: CaVin: The product of the buoy reference volume and added mass coefficient in the Y direction. Units: [m3] or [ft3] Z: CdAd: The product of the buoy frontal area and drag coefficient in the Z direction. Units: [m2] or [ft2] Z: CmVin: The product of the buoy reference volume and inertia coefficient in the Z direction. Units: [m3] or [ft3] Z: CaVin: The product of the buoy reference volume and added mass coefficient in the Z direction. Units: [m3] or [ft3]