Motorboat Owner Hit with Substantial Fine After Swimmer Collision at Sandbanks
A motorboat owner has been ordered to pay nearly £12,000 in fines and costs after colliding with a swimmer off the popular Sandbanks beach in Dorset. Mark Jeffs was navigating his 26-foot motorboat, named the Duchess, in a manner described as 'without due care and caution' when the incident occurred on October 12 last year.
Reckless Navigation Near Shoreline
Jeffs was operating his vessel at speeds reaching up to 35 miles per hour just 230 feet from the shoreline along the coastline at the entrance to Poole Harbour. This area is known for its busy recreational use and strict maritime regulations. He approached a group of open water swimmers who were training for a cross-Channel swim, creating a dangerous situation in the water.
After narrowly missing one swimmer, Jeffs slowed down to change a helm but subsequently struck another swimmer at lower speeds. The collision resulted in a minor injury to the swimmer and caused what authorities described as 'considerable distress' to those involved.
Investigation and Prosecution
The incident was promptly reported to the Poole Harbour Master, who conducted a thorough investigation in collaboration with Dorset Police. Investigators utilized radar data and CCTV footage to identify the vessel, which was tracked returning to its berth in Holes Bay following the collision.
At Poole Magistrates Court, Jeffs pleaded guilty to the charge of navigating without due care and caution. The court imposed a total financial penalty of £11,910.20, which includes:
- Two fines of £660 each for byelaw breaches
- Full prosecution costs of £9,562.20
- £500 compensation to the victim
- A court surcharge of £528
Safety Warning from Harbour Authorities
Following the incident, Poole Harbour Commissioners issued a stern safety warning to all motorboat users, emphasizing the importance of observing the 10-knot speed limit within the harbour entrance. Harbour Master Harry Gregory stated that the Commissioners will continue their efforts to educate harbour users about their duty of care and raise awareness of the byelaws designed to protect all harbour users, wildlife, and property.
'The rules are in place to ensure everyone can enjoy their time on the water safely and responsibly,' Gregory emphasized. 'If you break the rules, we will act and undertake an average of three to four prosecutions per season.'
The Harbour Master also noted that this incident serves as an important reminder that open water swimmers are increasingly present in the water throughout the year. He reiterated that the 10-knot speed limit remains in force within the Harbour Entrance all year round, a regulation that is reconfirmed each autumn through Local Notice to Mariners, which every harbour user should ensure they are subscribed to receive.
This case highlights the serious consequences of negligent navigation in busy coastal areas and underscores the importance of maritime safety regulations in protecting all water users.



