Custom Constantine 73

Overview — Rainbow | Constantine 73 Cutter-Rigged Sloop

Rainbow is a rugged and spacious 73’ offshore cruising yacht, custom built in California by Constantine Yachts and designed by Stephens Marine. Constructed of FRP (Fiberglass Reinforced Plastic).

This cutter-rigged sloop features a full keel, center cockpit design with a hardtop enclosure, and a 3-cabin / 3-head layout — ideal for private cruising or charter operations. Over the past several years, Rainbow has been successfully operated as a charter vessel in Mexican waters. The owner holds charter permits for this region, adding significant value for a buyer looking to continue charter operations or generate passive income.

Approximately $150,000 has been invested in upgrades, maintenance, and equipment — ensuring the boat is mechanically sound and outfitted for extended cruising or commercial use. She is equipped with a reliable Detroit Diesel 6-71N engine, Northern Lights generator, watermaker, modernized electrical systems, extensive navigation electronics, and a comfortable, functional interior.

Whether you’re looking for a comfortable cruiser, a liveaboard adventure platform, or a turn-key charter operation — Rainbow is a unique and proven vessel with tremendous potential.

Full Specifications

General

• Year Built: 1973
• Designer: Stephens Marine (California)
• Builder: Constantine Yachts, Stockton, CA
• Model: Constantine 73 Cutter-Rigged Sloop
• Hull Material: FRP (Fiberglass Reinforced Plastic — Composite Construction)
• Hull Type: Full keel, heavy displacement offshore cruiser
• Rig: Cutter-rigged sloop
• Length Overall: 73’
• Beam: 17’
• Draft: 7’
• Displacement: Approx. 85,000 lbs

Engine & Mechanical

• Engine: Detroit Diesel 6-71N (naturally aspirated)
• Engine Hours: Approx. 7,000 hours
• Transmission: Twin Disc
• Fuel Capacity: Approx. 1,000 gallons (four tanks)
• Water Capacity: Approx. 500 gallons
• Generator: Northern Lights 8kW Diesel Generator
• Steering: Hydraulic steering system
• Dual Racor fuel filtration systems

Electrical Systems

• 12V DC and 110/220V AC electrical systems
• Inverter system
• Shore power connection
• Battery banks with recent replacements
• Multiple battery chargers and management systems
• Lighting: LED interior and navigation lighting upgrades

Sails & Rigging

• Cutter rig with staysail and roller furling headsail
• Aluminum mast and boom
• Stainless steel standing rigging
• Assorted sail inventory (mainsail, headsails, staysail, storm sail)
• Lewmar winches throughout

Deck & Hull Features

• Center cockpit with hardtop enclosure
• Teak decks
• Large aft deck for lounging or dive gear storage
• Hot tub on aft deck
• Maxwell electric windlass
• 100 lb. Bruce-style anchor with chain rode
• Secondary anchors and ground tackle
• Stainless steel stanchions and lifelines
• Boarding ladder
• Dinghy davits

Interior Layout

• 3-Cabin / 3-Head Layout — Excellent for Charter or Family Cruising
• Forward Cabin with twin berths and ensuite head
• Midship Cabin with over/under berths
• Large aft Owner’s Stateroom with private head and shower
• Spacious salon with settee and dining area
• Full galley with stove, oven, refrigeration, and storage
• Navigation station
• Ample storage throughout

Additional Features & Equipment

• Watermaker system
• Air conditioning and heating
• Full complement of navigation electronics (GPS, Radar, Autopilot, VHF, AIS)
• Safety equipment (life raft, EPIRB, fire suppression systems)
• Extensive spare parts inventory