Drilling Riser Disconnect Watch Circle Calculator
Determine dynamic positioning (DP) drift-off velocities, Green/Yellow/Red watch circles, and emergency disconnect sequencing (EDS) margins before flex joint mechanical binding.
Vessel & Water Depth Parameters
Subsea Disconnect Limits & EDS Timing
Mechanical binding limit typically 10°
Shear drill pipe + unlatch LMRP
Watch Circle Radii & Disconnect Timelines
Terminal Drift Velocity:
—
— ft/s
Point of Physical Disconnect (POD):
—
— % water depth
GREEN (Normal)
—
YELLOW (Advisory)
—
RED (Execute EDS)
—
Available Decision Time:
—
EDS Operational Viability:
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