RedactedNarrative: 2 PWC's were recreationally cruising in the area of Garden Cove. The lead PWC (Vessel 2) started to slow down and come to a stop. Vessel 2 was stopped in the water. Vessel 1 was behind vessel 2 and had the sun in her eyes. She did not see that Vessel 2 was stopped in the water. Vessel 1 struck the passenger on Vessel 2. She struck the passenger of Vessel 2 in the back. Passenger on Vessel 2 was injured and self transported to the hospital after being checked over by Paramedics. Subject suffered deep  bruising and scrapes to the back. She was wearing a Type III life jacket. The impact was hard enough to cause bruising even while wearing a padded life vest.  Subject suffered deep bruising and scrapes to the back. She was wearing a Type III life jacket. The impact was hard enough to cause bruising even while wearing a padded life vest.