(BBC) Boats which are used for smuggling people into the UK and abandoned in the sea posed “enormous risks” to shipping, an MP said.
Seafarers said rigid inflatables, which are about 8m (26ft), caused a hazard.
Peter Aldous, Conservative MP for Waveney in Suffolk, has written to the shipping minister and chief executive of HM Coastguard.
The Ministry of Defence said the operation to remove boats had been “far more effective than previous years.”
Often the rigid inflatable boats (RIBs) are intercepted by authorities in the Strait of Dover with the people on board being rescued and taken into secure accommodation.