A life jacket
In the US, that would be a US Coast Guard approved Personal Flotation Device (PFD).
One USCG-approved PFD for each person
One USCG-approved PFD for each person
It depends on the size of the boat and its capacity.
Carry on board your certificate of numberCarry on board certification and number
A boat less than 12 meters (39.4 feet) in length must have a life jacket for each person on board, a sound signaling device, and a fire extinguisher if it has an enclosed space. Additionally, it should carry a visual distress signal if operating in coastal waters or certain navigable waters. It's also advisable to have a first aid kit and proper navigation lights if operating at night.
In Canada, you are required to carry one Canadian-approved life jacket or personal flotation device (PFD) for each person on board your boat. Additionally, there must be at least one life jacket or PFD that is appropriate for each person’s weight and size. It's essential that these devices are easily accessible and in good condition to ensure safety on the water.
PFD is required for each person aboardWearable PFD for each person aboard
A double sculling boat with two people in it, each person has one oar in each hand.
PFD for each person aboard.
For example, if you are operating a light board in an auditorium, it can control all the lights like flashing, regular, and even stroke lights. I can do every lighting you can think of. All you have to do is set the timer of the lights on the light board and organize each button to operate each light.
Pretty sure there has to be a life jacket available for each person on board a boat, but kids under 12, people fishing at night or people fishing on open waters have to wear one. Also the skipper determines if those aboard should wear one, depending on the conditions.
PFD for each person aboard.