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Meet Athena, She is a cruise ready boat that has been as far as Tortola and is currently docked in the Tampa Bay. She has all new B&G electronics to include radar and a fwd looking sonar. She is energy independent with set 930 watts of solar and 825 Amp/hrs of house bank LiFePo batteries. Athena is equipped with a bow thruster to make docking easier. All running rigging is run back to the cockpit to allow single-handed sailing if need be. She has a new Mainsail, Genoa and Code zero. All furling sails. She has a Lifeboat as well. There is a 10ft dinghy and a 9.9 tohatsu outboard as well. This lady is CRUISE READY!
Equipment: 2ea NEW SmartPlug 30 Amp Dual Configuration Cordset with Shore Power Inlet-Stainless(much safer than old orange cordsets) Promariner inverter ProMariner 12/60 battery charger LEWMAR Bow Thruster with New Bow thruster controller @ helm 2 Electric Heads with showers NAV: New(2022 install) B&G NAVIGATION SUITE, WITH RADAR- HALO 20 , Triton Autopilot, B&G Zeus 3S 12” MFD, DUAL HELM TRITON TRIDATA, FWD LOOKING SONAR NAC3 AutopilotVESPER XB-8000 Class B AIS Transciever FUSION MS-RA70NSX BT Stereo 3ea 275 A/HR BATTLEBORN LIFEPO BATTERIES 3ea 335 watt LGLG335N1C-V5 Monocrystalline solar panels Lifeboat
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)
Deep draft version” 6.92’
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