74 Commercial 1987 Boat for Sale

No Name Yacht | 74' Commercial 1987

NEW TO MARKET, LCU-8, BUILT FOR US NAVY, EXCELLENT CONDITION! EVERYTHING WORKING 

LCM-8 "Mike Boat" Specifications Often called the "Mike Boat," the  LCM-8 is a rugged, steel-hulled vessel designed for transporting heavy equipment and troops from ship to shore.  

• Length Overall: According to Wikipedia and Ocean Support Vessels, the craft measures approximately 73 feet 7 inches to 74 feet.
• Beam: 21 feet.
• Displacement: Approximately 105 to 111 long tons when fully loaded.
• Propulsion: Typically powered by two Detroit 12V-71 diesel engines providing 680 hp sustained to twin shafts.
• Capacity: It can carry one M48 or M60 tank, or up to 200 combat troops.
• Performance: A maximum speed of 12 knots light or 9 knots when fully loaded, with a range of 190 nautical miles.
• LCM-8 "Mike Boat" (74-Foot Craft)The LCM-8 is designed for short-range ship-to-shore shuttle operations rather than independent long-distance travel.
  • Fuel Capacity:
    • Standard Military Spec: Approximately 864 gallons.
    • Commercial/Private Builds: Varies by modification; for example, a 1972 Gunderson Marine build is listed with a 640-gallon capacity across two tanks. Other variants have been recorded with up to 900 gallons.
  • Range:
    • Full Load: 190 nautical miles at a speed of 9 knots.
    • Light (Unloaded): Approximately 332 nautical miles at 11 knots.
    • Extended Range: Some modified or civilian versions claim a range of about 400 miles with a 60-ton load.
    • Fuel consumption for the Detroit 12V-71 engine varies significantly based on engine "tune" (naturally aspirated vs. turbocharged), RPM, and load. In a 74-foot craft like an LCM-8, which typically uses twin engines, you must double these figures for a total vessel burn rate. 
      Hourly Fuel Consumption (Per Engine)
      • Idle / Low Speed (1,000 RPM): ~5 to 9 gallons per hour (GPH).
      • Cruising (1,200–1,500 RPM): ~12 to 24 GPH.
      • High Cruise (1,800–1,900 RPM): ~40 to 54 GPH.
      • Wide Open Throttle (2,100–2,300 RPM): ~65 to 80 GPH. 
    • 
      Trip Cost Calculation FactorsTo estimate costs for a specific trip, use the following variables:
      • Standard Efficiency: A common "rule of thumb" for these two-stroke diesels is 1 gallon per hour for every 20 horsepower produced.
      • Twin Engine Total: For an LCM-8 at a steady 10-knot cruise (approx. 1,200 RPM), expect a combined burn of roughly 25 GPH.
      • Engine Type: Turbocharged (12V-71T/TI) models are generally more efficient per horsepower than naturally aspirated (12V-71N) models, but they produce more power and can burn more total fuel at high RPMs.
      • "Wet Stacking" Risk: Running these engines below 1,300 RPM for extended periods is often discouraged as it can lead to incomplete combustion and carbon buildup. 
    • 
      Estimate Formula
      For example, a 50-nautical-mile trip at 10 knots (5 hours) burning 25 GPH total would consume 125 gallons of diesel.
    • 
      

74' x 22' x 4

Hydraulic bow ramp

Built by Bender Shipbuilding, Alabama

Gross tonnage: 95 ton

Net tonnage: 76 tons

Hull depth: 9'

Head room: Cabin - 7', Engine room - 6'.

Shell plate thickness: 1/4"

Bulkhead thickness: 1/4"

(2) 12V-71 Detroit Diesel engines

Steering: Hydraulic

Propellers: 34" x 24"

Fuel capacity: 900 gal

Fuel consumption: 12 GPH

Denison Yachting is pleased to assist you in the purchase of this vessel. This boat is centrally listed by WORLDWIDE YACHT SALES.

Denison Yacht Sales offers the details of this yacht in good faith but can’t guarantee the accuracy of this information nor warrant the condition of this boat for sale. This yacht for sale is offered subject to prior sale, price change, or withdrawal from that yacht market without notice. She is offered as a convenience by this yacht broker to its clients and is not intended to convey direct representation of a specific yacht for sale.