RedactedNarrative: During maintenance repairs, Unit 1 caught fire and burned. The two individuals working on Unit 1 were injured. No others were injured. The fire on Unit 1 caused radiant heat and cinder damage to nearby Units 2, 3, and 4. 
   
  At approximately 10 AM, Unit 1 owner and friend arrived at Shelter Cove Marina Dock F, Slip to change batteries aboard Unit 1. They noticed fumes once they got on board. They turned on blower system, opened holds, and went to purchase batteries while Unit 1 aired out. At approximately 1 PM they returned and installed new batteries. As they were packing up, a ratchet fell across battery terminals and created a spark that ignited residual fumes.
   
  This flash set Unit 1 on fire and caused Friend to fall and burn his left knee and ankle inside of Unit 1. Owner pulled Friend out of Unit 1.They used 2 B-11 fire extinguishers, but were unable to control the fire. They were forced to retreat as the smoke and flames engulfed Unit 1. Hilton Head Island Fire Rescue responded, extinguished the Unit 1 fire, and conducted a fire investigation. Both Owner and Friend were taken to Hilton Head Memorial Hospital to be monitored for injuries, complications, and smoke inhalation. 
   
  Friend received treatment for 1st/2nd degree burns to back of left knee and to left ankle. Both had singed hair. Unit 1 had been backed into Slip 3 with bow facing West. It was tied to dock on port side. The fire consumed the vessel from the inside out. The interior was destroyed by fire but the hull remained intact. It is estimated to be a total loss of $60,000.The extreme heat produced by the fire on Unit 1 damaged three other nearby vessels. 
   
  Unit 2 was in Slip, to left of Unit 1,facing same direction. It was tied to dock on starboard side, which received the most heat damage. The gel coat, fiberglass,hull, rub rail, engine cowlings, gunnels, center console, electronics in dash, receivers, tee top, canvas, and upholstery all showed signs of extreme heat damage to include cracking, melting, burning. It is estimated to be a total loss of $101,000. 
   
  Unit 3 was facing North in Slip, directly behind stern of Unit 1. It was tied to dock on port side. Unit 3 estimated heat damage includes a melted satellite TV dome and damage to roof mounted radar and GPS components. Estimated damages $10,000. Unit 4 was in Slip,to right of Unit 1, and was facing same direction as Unit 1. It was tied to dock on starboard side. 
   
  Most of Unit 4 heat and cinder damage was on port side. Hull, roof, arch, and deck structures also sustained damage to include fiberglass and gel coat, teak swim platform, deck upholstery, roof mounted electronics receivers, rub rail, and melted wiring. Unit 4 being taken apart from the inside to inspect and evaluate the structural integrity of hull, arch, roof, deck, electrical, and wiring systems,as well as any other hidden internal damages. The owner of Unit 4 agreed provide information on additional damages and estimated $ amount upon completion of inspection and evaluation. This report is an explanation of Unit 4 owner and vessel name discrepancies. Unit 4 displays name Never Say "Never", Hilton Head Island, SC, however, a Hull ID search shows Unit 4 having documentation number 1210865 with vessel name Sassy Girl, Elephant Butte, NM. 
  
   