Fremantle Sea Rescue has undertaken an intensive two-day jet-ski course with Illawarra-based training company Risk, Response and Rescue.

The West Australian operation decided to add jet-skis to its fleet after an increase in marine activities and community sporting events along the coastline.

"From an ongoing safety point of view, it's a complete game changer," Fremantle Sea Rescue president Phil Martin said.

"There's just so many sports events over there in the summer and some of them were starting to be cancelled because ... we didn't have enough capacity to support all of the events.

"We're the country's busiest marine rescue group, we're just flat out doing standard rescues, so trying to find the extra bandwidth to do community support had always been a bit of a struggle.

"But with the skis, I think we'll be able to manage it quite well so it's going to be really good," he said.

Craig Zulian of Risk, Response and Rescue said the two-day course gave extensive training in still and rough water rescues, first aid, mock scenarios, mass rescues and search patterns.

"Basically they've had to wait too long for the emergency services to turn up, now they're going to be able to get on scene and literally pluck the swimmers out of the water," Mr Zulian said.

Jet-skis are able to manoeuvre in close proximity to swimmers, over rock shelves and quickly through shallow water.

Reflecting on the work of Fremantle Sea Rescue, Mr Zulian believed it was extremely beneficial for them to have operating jet-skis.

"They do a lot of searches for missing people.

"They've been to a lot of the shark attacks that have been going on over there.

"They're first response basically and now they're going to be able to cast the skis out and get out there in a hurry in any conditions. It's heaps better for the community," he said.