With the tuna season in full swing, Sergeant Ben Penrose said the number of boat owners/operator who were not complying with regulations was remaining consistent.

"We had nine water police members attended. We're getting consistent numbers. It's not really changing," he said.

"We ran exact the same operation just over a month ago. We did come across a number of people who we had issued infringements to previously and those problems had been rectified. That's positive, we're happy we saw that."

Sergeant Penrose said the operation ran from 5am to 4.30pm Saturday.

"In the early morning between 5am and 9.30am we focused on trailer safety and road worthiness at the Portland ramp and Port Fairy," he said.

"The focus was boats being secured to trailers. We found 10 boats were not secured at Portland and two at Port Fairy and issued $221 fines."

Sergeant Penrose said all boats were secured at the front but they also had to be secured at the rear to avoid movement if drivers had to take evasive action or brake heavily.

"We had a few issues with boats not being secured at the rear. We also found four vessels in Portland more than 2.5 metres wide with no oversize signage and issued $295 infringement notices," he said.

"One trailer in Portland had no braking system for a two-plus-tonne boat. The operator received a penalty notice of $369 for having an unsafe trailer."

The water police operation chief said in the afternoon members focused on vessel compliance, including registration, licence, safety compliance and speed in the Portland harbour.

He said the harbour was mostly a five knot zone although it was eight knots in the middle.

"Three vessels including one commercial were detected speeding. There was one vessel with no life jacket and one unlicensed operator," Sergeant Penrose said.

"There was one boat detected travelling at 16 knots. That attracted plenty of attention. He went through the eight knot zone and into the five at that speed. The fine for speeding was a $295 fine."

Sergeant Penrose said six tickets of between $185 and $285 were also handed out for safety equipment breaches, including flares that had expired, torches not working and failure to have a fire extinguisher.