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Main Description The Com-Pac 25 is a recreational keelboat, built predominantly of fiberglass, with wood trim. It has a masthead sloop rig, a raked stem, a near-plumb transom, an internally mounted spade-type rudder controlled by a tiller and a fixed fin keel. It displaces 4,800 lb (2,177 kg) and carries 1,900 lb (862 kg) of ballast. The boat has a shoal draft of 2.50 ft (0.76 m). Under sail the boat is well balanced on all points of sail. Equipment Cockpit cushions Tiller steering Tiller Pilot ST1000 Perch seats Enclosed head with Port a potty (never used) Cabin top main sheeting with 4 to 1 traveler. CDI FF4 Roller Furler Guest 2 bank 15 amp Battery Charger 120 volt shore power system. Lazy Jacks Pressure cold water Rub rail Upgrades/Improvements Garmin EchoMap Plus 94sv (2019) with new Bronze Transducer New Automatic electric Bilge Pump (2019) New Neil Pryde Main with single reef point (2019) New Sunbrella UV cover for 120% Jib (2019) New Main cover (2019) New Bimini (2019) New electric bilge pump and switch. (2019) New running rigging, main sheet, main halyard, traveler lines and jib sheets (2019) Standard Horizon GX1700 Explorer GPS VHF Radio - Black (2019) New Lazy jack lines (2021)
New lead acid batteries (2) (2020) B&G Wind Sensor and Display (2020) Lewmar Ocean 16 self tailing primary winches (2020) Lewmar st14 cabin top winches Mid-Ship Cleats Recent maintenance New Motor Mounts (2019) Shaft log Sealed (2019) New Raw water pump (2019) CDI Roller Furler repair kit (2019) Manual Bilge Pump new (2021) New fresh water pump- 2024
Equipment: Seller notes 1996 Compac 25 (Zephyr) Story The prior owner purchased the vessel in October of 2018 from a couple on the Barnegat Bay who were retiring from sailing. The prior owner began a multi-year improvement project, beginning with installation of a 9 inch Garmin chartplotter and bronze Airmar B117 transducer. A new DOMETIC 970-Series Portable Toilet was purchased and installed. Never used, since the boat was day sailed only . Next spring a new sail cover and bimini in hunter green sunbrella fabric were custom made for the boat, providing protection from the sun while sailing. The running rigging (jib lines, main sheet, traveler lines) were replaced with STA-SET 7/16 line. The jib halyard was not replaced since the CDI Flexible Furler has an internal halyard. The older jib halyard can be used as a spinnaker halyard, but no spinnaker is available. Older CDI furlers had an issue with the internal halyard and an update kit was installed to improve the function of the jib halyard. During the first season sailing the prior owner noticed the boat had a slow shaft leak. It was determined to be a leak in the shaft log. A new shaft log was installed along with new motor mounts and a new bilge pump. The boat has been dry ever since. A new Neil Pryde Cruise Main was ordered from Beaton Sails of Brick ( https://neilprydesails.com/images/pdf/Cruise Main.pdf ). A new topping lift was installed ( STA-SET). New Lazy Jack lines were installed to complete the replacement of running rigging. The boat came with a pair of Lewmar self-tailing 14?s as primaries. The owner moved the 14?s to the cabin top and installed a pair of Lewmar Ocean ST16 AST as primaries. A two line reefing system was configured by using the hardware for the jib halyard to run a downhaul on the port side. Starboard side has the main halyard run to the cockpit. A Harken cam cleat was installed to allow quick release of the mail sheet in case of wind gusts. A pair of midship cleats were installed on the gib track to provide good purchase for spring lines. The boat came with quality blocks and a strong rub rail. A B&G wireless wind sensor was installed at the masthead along with a B&G Triton 2 display on the port bulkhead along with a NMEA 2000 network . The Garmin chartplotter was networked to allow the Chartplotter to display wind data from the B&G system and the B&G Triton to display depth and position data from the chartplotter.? The Westerbeke two cylinder engine has been a solid performer, but did lose power at one point. It was determined to be bad fuel. The tank was emptied and cleaned. All new fuel lines were installed along with a Racor Secondary Fuel filter. The engine has run flawlessly since. Two new lead acid batteries were installed in 2020. Batteries were stored by the yard every winter. The Com-Pac 25 is a recreational keelboat, built predominantly of fiberglass, with wood trim. It has a masthead sloop rig, a raked stem, a near-plumb transom, an internally mounted spade-type rudder controlled by a tiller and a fixed fin keel . It displaces 4,800 lb (2,177 kg) and carries 1,900 lb (862 kg) of ballast. The boat has a shoal draft of 2.50 ft (0.76 m). Under sail the boat is well balanced on all points of sail. NO TRAILER
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)
Originally the WATKINS 25.
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