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Numa is a beautiful example of a charter ready or large family catamaran. She has 4 cabins all with en-suite heads with shower and toilets. There is an additional bunk mid-ship in the port hull making her a 9 sleeper. The Salina has tremendous beam and this already large cat feels massive, allowing guests onboard the chance to always have space to relax. From the aft sunbed to the expansive trampoline up front she feels huge. There is a extended GRP hard top giving the captain shelter from the sun. Should it be required there is a v-berth for the captain in the port bow and a captains head in the starboard bow. Each of the 4 cabins has a queen size bunk with full side access aft and single side access forward. In the salon is a 6 burner stove and a large teak salon table to enjoy the meals at. The interior nav station allows for sheltered navigation when the weather turns. Space for a full size domestic fridge makes her a truly comfortable live aboard.
Numa has traveled many 1000’s of miles safely and will continue to serve the next lucky owners. For private showing information please contact Keith McVeigh at (470)313-8589 or km@denisonyachting.com
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)
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