"The group managed to keep one cellphone dry to make an emergency call, however they were extremely lucky to have managed this," Cogger said.
"A grab-bag containing a GPS, marine radio and some flares would have greatly assisted them and helped speed up the search and rescue operation.
"It was only after police and Maritime New Zealand related a mayday that other vessels were able to come to their assistance – this kind of delay can be the difference between life and death."
Cogger said it was a timely reminder for boaties to have the appropriate emergency and communication gear on board.
"This gear can save your life if you get into trouble.
"We'd like to thank those crew aboard the mussel harvester, Platinum, who stopped their workday and responded – without their help today things could have turned out quite differently," Cogger said.
None of the four men were injured in the incident.
The boat was recovered using the mussel harvester's crane and towed back to Motueka by the Harbour Master.