Seller's Description
I have been the very satisfied sole owner of my 1984 documented Herreshoff Cat Ketch 31, NOMAD. If you are not familiar with this design, please FIRST read the excellent comprehensive review from Practical Sailor (search PS reviews under “ herreshoff-cat-ketch-31 “). Although the review emphasizes the simplicity and excellent sailing qualities of the design, I would feature her fine sea-keeping ability and ease of single handing (no winches, main and mizzen sheets easily handled while seated at the tiller). And, she has a unique tabernacle system for the freestanding masts that can be operated at no cost by a single person dockside or at anchor. Her interior is the optional two cabin layout in tropical oak, Tabebuia rosea. (see interior photos and cabin layout plan)
Nomad, is seeking a new master who; Wants to coastal cruise and gunkhole in comfort with their partner or family, Values the elegance, simplicity, practicality and romance of a classic design, Appreciates the wisdom that L. Francis Herreshoff imparts in The Complete Cruiser,
If the above describes you, Nomad would like you to contact her current owner to get acquainted.
(CLC Eastport Pram sailing dinghy available for an additional $2K)
Will consider trading NOMAD for a CLC PocketShip plus $$$ TBD
Equipment: CONSTRUCTION Closed cell Airex foam core throughout. Masts -‘Box section’ hollow mahogany, in custom aluminum plate tabernacles.
Interior Layout (aft to forward)
SALON Starboard: quarter birth (storage under), settee/single birth (storage under, shelf/lockers above) Port: Galley, settee/double birth (storage/holding tank under, pilot birth above) Center: folding table w/moveable fiddle rails & 3 central drawers
HEAD COMPARTMENT Starboard: basin w/handheld shower(cabinets above & below) Port: WC (hanging locker behind) Below: teak grate w/shower sump under
Forward Cabin: V-birth (storage & water tank under)
Sail Inventory by Fowler Sails, Miami, FL Main 242 sq ft Mizzen 151 sq ft Mizzen Staysl 248 sq ft Riding Sail by Sailcraft
Dodger (new 2022), Cockpit Bimini top, Cabin sunshade/awning w/fittings for rainwater catchment.
Propulsion Universal M-18 2 cylinder diesel, fresh water cooled w/2:1 reduction drive, 2 blade prop, 16 gallon fuel tank Dahl Model100 Fuel Filter/Water Separator Exhaust hoses, shaft ‘boot’new double clamps 2023 4 6V deep cycle batteries (set in 2 series pairs) new 2023 Solar panels; Seamans SM 55 w/ Sunsaver Regulator plus Solar Pulse industrial solar charging system
Instrumentation/navigation Datamarine depth sounder Furuno GP-30/35 GPS Richie Bn202 bulkhead compass new 2022 Bracket to hold your iPad running iNavX charts Standard Horizon GX2350Z VHF/loud hailer Raymarine ST-1000 Plus Tiller Pilot LED nav lights
Safety/Maintenance Fireboy Auto Halon 1301 system 2 Kidde dry chemical fire extinguishers 2 12V automatic bilge pumps Raritan K-1 diaphragm hand pump Cockpit drain hoses w/new double clamps 2023 Propane solenoid shutoff valve Radar reflector Life jackets & horseshoe buoy Lifelines Swim ladder steps built into rudder (as per L.F. Herreshoff in The Complete Cruiser) 12V Electric winch for mainmast tabernacle Black and Decker Power Station battery pack Winter storage/transport steel cradle
Ground tackle/dock lines 25 lb. 3 part Luke (Herreshoff) anchor w/6 chain 100ft nylon rode 35 lb ‘yachtsman’ storm anchor w/100ft nylon rode 15 lb CQR kedge anchor w/100ft nylon rode Assorted dock lines and spare cordage
Domestic 50 gal. SS water tank PAR 36970 pressure water system 10gal hot water tank w/engine heat exchanger Force 10 gimbaled 2 burner propane stove with oven and broiler (2 10 lb gas tanks) Frigoboat keel cooled fridge/freezer Assorted cookware, cutlery, plates, etc. Magma Marine Kettle Barbeque (rail mounted propane grill) Raritan PH II Marine Head, 20gal bladder holding tank Basin w/Ambassador135-0213-CWfaucet/shower head Shower sump drain pump (new 2022) Cockpit shower LED and fluorescent interior lights Jensen KCD 9860 AM/FM Stereo-Radio/CD Player
Specs
- Designer
- Halsey Herreshoff
- Builder
- Cat Ketch Corp.
- Associations
- ?
- # Built
- 100
- Hull
- Monohull
- Keel
- Fin
- Rudder
- Transom hung
- Construction
- Wood/FG
Dimensions
- Length Overall
- 30′ 10″ / 9.4 m
- Waterline Length
- 27′ 11″ / 8.5 m
- Beam
- 10′ 3″ / 3.1 m
- Draft
- 4′ 0″ / 1.2 m
- Displacement
- 7,560 lb / 3,429 kg
- Ballast
- 3,350 lb / 1,520 kg (Lead)
Rig and Sails
- Type
- Cat-Ketch
- Reported Sail Area
- 393′² / 36.5 m²
- Total Sail Area
- ?
Mainsail
- Sail Area
- ?
- P
- ?
- E
- ?
- Air Draft
- ?
Foresail
- Sail Area
- ?
- I
- ?
- J
- ?
- Forestay Length
- ?
Auxilary Power
- Make
- Nanni/Yanmar
- Model
- ?
- HP
- ?
- Fuel Type
- Diesel
- Fuel Capacity
- 18 gal / 68 l
- Engine Hours
- ?
Accomodations
- Water Capacity
- 60 gal / 227 l
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- 3
Calculations
- Hull Speed
-
9.1 kn
Classic: 7.09 kn
Hull Speed
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Formula
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
- Sail Area/Displacement
-
16.3
Sail Area / Displacement Ratio
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
Formula
SA/D = SA ÷ (D ÷ 64)2/3
- SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
- D: Displacement in pounds.
- Ballast/Displacement
-
44.3
>40: stiffer, more powerful
Ballast / Displacement Ratio
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Formula
Ballast / Displacement * 100
- Displacement/Length
-
154.0
100-200: light
Displacement / Length Ratio
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
Formula
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
- D: Displacement of the boat in pounds.
- LWL: Waterline length in feet
- Comfort Ratio
-
17.9
<20: lightweight racing boat
Comfort Ratio
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Formula
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
- D: Displacement of the boat in pounds
- LWL: Waterline length in feet
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
- Capsize Screening
-
2.1
>2.0: better suited for coastal cruising
Capsize Screening Formula
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
Formula
CSV = Beam ÷ ³√(D / 64)
- Beam: Width of boat at the widest point in feet
- D: Displacement of the boat in pounds
Notes
Mainsail 242 sq.ft./22.48m2
Mizzen sail 151 sq.ft./14.03m2
Staysail 248 sq.ft./23.04m2
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