RedactedNarrative: Operator #1 being inexperienced with boating, grounded Vessel #1 on a marked underwater hazard after not understanding how to navigate marker buoys. 10 passengers were on Vessel #1, all were unharmed and boated back to shore by park officers. Vessel #1 was ungrounded and loaded onto truck and trailer, there was damage to the propeller and slight superficial damage to the hull and tracking fins.