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Go small, go simple, but go! - Larry & Lynn Pardy If you are a cost-conscious cruiser looking for lower maintenance cruising, my 365 would be the boat you need. This past December I will have owned, lived aboard, and sailed Tethys for 20 years (almost 12 years in the Caribbean). Ive spent the last 3 hurricane seasons in Grenada and just sailed Tethys up from Grenada to Miami, arriving December 11, 2024. When I got the boat, the previous owners had set Tethys up with simple, mostly manual systems, the idea being to save the money and make cruising less problematic. Ive kept it that way. Though semiretired, I still work on boats (have for 29 years) and I find that new boats have more issues than this older boat does. Less systems to go wrong! The vessel is registered as an Antique Vessel in Florida, and enjoys the benefits of the status! (Note: I will be taking all my personal things, tools, etc with me)
Equipment: -Haul out- 3.5 coats Trinidad Pro, 3/4 coat of Trinidad SLR 4/22 -New thru-hull for galley sink/cockpit drain 4/22 -Sink drain hose replaced 4/22 -New shaft, strut, & gudgeon zincs4/22 -New North mainsail w/3 reefs 8.4 oz 4/22 -New dodger w/snap on sunshades for the isinglass.4/22 -New bimini 4/22 -(4) new 6 volt batteries 1/23(house bank) - New starting battery 6/24 -Replace glass in head porthole w/Lexan 2/23 -3 deck hatches have new translucent acrylic (have acrylic for galley hatch) -New main sheet deck blocks 4/23 -Strip coamings, handrails, cap rails, & brow (4 coats Cetol Light w/3 coats Cetol Clear Gloss on top). Reseated stbd aft handrail- the last of the 4- w/new bolts, and a lot of new screws & bungs in cap rail 1-3/23 -New mizzen sheet 6/21 -New crane halyard 6/21 -New davit tackle lines6/22 -Raw water pump impeller changed 6/22 -Exhaust elbow nipple was replaced 4/23 -Anchor locker divider replaced 8/23 -Mast boot replaced 7/22 -New LPG Force Ten gimbaled 3 burner range/oven/broiler10/21 -New nickel-plated valves for fresh water tanks manifold11/21 -Skipper II head rebuild 10/24 -Replaced steering cable 1/22 -New headsail sheet 11/21 -New main, jib, mizzen, & staysail halyards 1/18 -Upgrade sheet winches to Lewmar #46ST 2/20 -Added 2 bronze aft cleats 2/20 - -New 20kg (45#) Vulcan anchor 4/23 -Primary Vulcan anchor w/200 5/16 G4 chain & 150 3/4 line -(1)Lewmar Claw 20kg (#44) secondary anchor w/78 5/16G4 chain & 100 3/4 line. -(1) 20kg (45#) Delta anchor & (1) 44# WM Danforth in cockpit lockers with unattached chain -(1) 5/16 G4 piece used 40, (1) piece 7/16 G4 25 plus sufficient 3/4 nylon line for both. And more long lines! -Mantus chain hook w/20 of 5/8 nylon snubber -SL SeaTiger 555 2 speed manual anchor windlass & handle - lots of cleats for dock lines: (2) on bow, (4) midship with LARGE chocks, (4) for stern lines -Dock lines. -Upsized 316 SS standing rigging 2004, (running mizzen backstays are 304 7x7 3/16 SS, replaced 2016) -Uniden VHF new, 8/24 -ACR Global Fix Pro EPIRB (battery & GPS test passed 6/24) -(3) offshore life jackets, (3) regular life jackets, (1)WM inflatable jacket w/ incorporated harness and re-arm kit -LifeSling in custom valise -up to date flares & gun w/recent out of date flares -(4) fire extinguishers - All cushions covered in Sunbrella, in good condition -(4) LPG tanks:(1) aluminum 10#, (3) composite 11# -LPG solenoid activated in galley (can be manually shutoff) -(2) Boise speakers in salon (wiring in place in v-berth) -Dual stereo -All (but 2) LED lights (all reading lamps were changed a few years ago) (steaming & deck lights are incandescent) - (4) 12v cabin fans: (3) Hella, (1) Caframo -Whale galley foot pump with rebuilt spare pump & kit -(3) Fynespray brass sink pumps: galley- salt & filtered fresh water, head sink fresh water -Whale foot pump in galley -Guzzler pump for shower -(4) Henderson diaphragm manual pumps: (1) for shower/ head sink sump, (1) for holding tank overboard, (2) bilge pumps -(2) 12v bilge pumps -(2) 100 watt solar panels, (1) 75 watt solar panel, with Flexcharge NC12L12 charge controller and BlueSeas ACR -galvanic isolator for shore power -(4) various size fenders for boat & (3) small ones for dinghy -folding teak cockpit table -drop leaf was added to port salon berth (in 11/2016) -rudder was removed 12/2016: stock cleaned / inspected, & stuffing box mount rebuilt Theres more
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.
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
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.
SA/D = SA ÷ (D ÷ 64)2/3
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.
Ballast / Displacement * 100
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.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
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.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
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.
CSV = Beam ÷ ³√(D / 64)
Available as sloop, ketch, or cutter.
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