Safety Flash
Loss of DP position caused by incorrect gyro heading
Loss of DP position caused by incorrect gyro heading
- IMCA
- Safety Flash
- IMCA SF 09/08
- Control of WorkMachinery and EquipmentMarine Operations
- Loss of station keeping
- Dynamic positioning
- Navigation and positioning equipment
- Marine industry
- Vessel
Summary
A DP Class 2 shuttle tanker lost position during an offtake operation when erroneous GPS signals affected all gyros, corrupting offset calculations and position references. The flash records stricter acceptance criteria for position reference systems and a forthcoming manufacturer software upgrade to reject erroneous latitude and speed compensation data.
Classifications: Loss of station keeping; drive-off; drift-off.
Classifications: Dynamic positioning; DP; DP operations.
Classifications: Navigation and positioning equipment; ECDIS; AIS; chart plotters.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
Erroneous GPS signals produced incorrect gyro headings and corrupted dynamic positioning calculations, causing loss of position reference.
IMCA SF 09/08. Themes: control of work, machinery and equipment, marine operations.