RedactedNarrative: Vessel 1 (FL 2690 DK) was heading Southbound in the Intracoastal Waterway.  The operator struck an underwater obstruction within the waterway. The force of the impact caused the Starboard motor to be ripped off the transom and damaged the lower units of the Center and Portside motors.  PFDs were on board but not used.  There were no injuries due to the accident and no evidence of alcohol or drugs contributed to the incident.