Requirements (baseline)
Dimensional parameters
- Length along the waterline (LWL): 38-48 ft
- Overall length (LOA): 39-52 ft
- Draft: 3 ft 9 in to 5 ft 4 in
- Beam: 21-26 ft
- Bridge deck clearance (underwing, at loaded displacement, lowest point): target >= 30 in (0.76 m); prefer ~33 in (0.84 m)
- Waterline to mast tip clearance: 63 ft
Minimum interior height
- Salon + companionways: 6 ft 3 in to 6 ft 9 in
- Cabins + heads: 6 ft 0 in to 6 ft 9 in
Accommodation (passenger capacity)
- Either: two queen cabins or one queen cabin plus a crew bunk room
- At least one king cabin / owner's suite with head and shower
- At least one shared head + shower or two private heads + one shared shower
Galley
- Microwave: > 1.4 cu ft
- Air fryer: > 1.4 cu ft
- Range: 3-4 burner, propane, gimballed
- Oven: > 3 cu ft, propane, gimballed
- Refrigerator: > 4.4 cu ft
- Top-loading freezer: > 9 cu ft
- Double sink with salt and hot/cold fresh water faucets
Salon
- Seating for six
- Table removable/lowerable to convert settee into sleeping area
Navigator's station
- Adjustable seating
- Chart storage
- Compass/GPS/autopilot/engine monitoring/controls
Cockpit
- Bimini or hardshell canopy
- Storm/wind protection
- Helm with autohelm
- Helmsman's seat
- Full suite of nav aids and radio
- View into the salon
Safety systems
- Fire suppression: engine rooms; crew/passenger areas; storage lockers; extinguishers
- Life raft
- Man overboard systems
- Perimeter railings and safety lines
- Grab bars
- First aid
- Emergency beacon
- Mast, anchorage, and navigational lighting
- Low-voltage nighttime illumination
Major physical systems (baseline targets)
- Hulls and structure
- Mast, rigging, running tackle
- Propulsion: two diesels, 30-40 HP each
- Sails: mainsail, spinnaker, genoa
- Electrical generation: solar/wind and diesel/alternator; charge 20-80% in 8 hours or less
- House battery banks: 24 hours at full house load with no generation online; prefer distributed banks with cross-wiring for failure tolerance
- Distribution: breaker/fuse panels; prefer subpanels per hull and salon with master control at nav station
- Comms: VHF; satellite; WiFi x3 (hull/hull/salon-cockpit)
- Navigation: radar; chart/plotter; autopilot
- Watermaker: redundancy per hull preferred
- Tankage (redundant per hull preferred)
- Fuel: minimum 900 mile range at cruise
- Freshwater: > 240 gallons each
- Wastewater: > 120 gallons each
- HVAC: at minimum heat pump AC + heat in salon; prefer zones per hull + salon with cross-ducting
Non-traditional systems to evaluate (where practical)
- Networks and entertainment computing (distributed)
- 16-port managed switch in each hull
- 16-port managed switch at nav station
- Video/audio file server
- 3U server in each hull (Dell PowerEdge R720xd or similar)
- 8-12 20TB disks
- 16-32 cores (2 CPUs)
- 128-256 GB RAM
- GPU for transcoding and inferencing
- Raspberry Pi integration hub in each hull
- Raspberry Pi touchscreens: cabins, cockpit, salon, galley, engine bays/holds
- Each Pi: UPS/battery hat (90 min runtime at 50% load), weatherproof enclosure, airflow for 100F ambient
- Video: salon projector or 35 in flat panel; cabin video
- Audio: salon 5-channel; cabin stereo
Additional considerations (stubs)
- Tender and davits
- Anchors and ground tackle
- Swim ladders, pulpits
- Transom shower
- Deck/hull/mast maintenance tooling (bosun's chair, washdown)
- Bumpers/fenders
- Vents, hatches, locker access/illumination/organization