The Department of Land and Natural Resources is reminding boaters to always be on the lookout for people, and divers to always mark their spot by using a dive flag.
Staff members set up tents at the Lanikai boat ramp Saturday to talk to people about ocean safety.
Earlier this year, an Oahu man was killed and his son was injured after they were struck by a boat in that area.
Officials were there reminding people to display dive flags if they go underwater, and also check if boaters have their operator certifications.
“We know common sense. We are supposed to be visible,” said Kailua resident Deborah Tom, “but I didn’t realize that the minute we decide to submerge, it means we are supposed to have a buoy marking us that we have gone under.”
DLNR Oahu branch chief Guy Chang said “The rule is, if you are doing underwater activity, it would have to be diving. You could swim on the surface and not have a buoy, but the divers who are diving, they need to have a buoy.”
Last year, 11,500 people took a boater safety education course, according to DLNR, and more outreach campaigns are planned for the year.