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), she was built to handle serious bluewater passages with comfort and safety in mind.

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 capable offshore 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