THIEVES stole $6000 of boating equipment from a boat in North Fremantle at 6am on Anzac Day last weekend.
Snr Const Pete Murphy said the theft happened at Pier 21 Marina.
"It's a low act that when people are taking their time to go to dawn services, at the same time someone is taking advantage of there being fewer people about," he said.
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READ NOWPolice suspect a woman on the jetty wearing a striped top, with a child aged about seven, was looking for likely targets about 5.50am.
A short time later, CCTV recorded three Caucasian men going to a 10m cabin cruiser moored at the end of the jetty, breaking into the vessel and removing a GPS device, a VHF radio and a 5hp Mariner Outboard engine.
Snr Const Murphy said the youngest of the trio " aged about 17-19 and wearing jeans and a black t-shirt over his blue hooded jumper " carried the outboard engine from the boat along the jetty.
A man aged 20-30 " wearing blue shorts and a black t-shirt with a grey black hooded jumper " had a duffel bag in which police suspect the GPS and radio were carried.
The eldest man, aged about 40, wore jeans and a peaked black cap over with a hooded jumper pulled over.
Police have urged local residents to report suspicious activity near Pier 21 to Water Police on 9442 8600.