Detailed sailboat specifications and datasheets since 2015
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Hunter 25.5 (Deep draft)

Main featuresHunter 25.5 Deep draft
Model
Hunter 25.5
Version
Deep draft
Hull type
Monohull
Category
Cruising sailboat
Sailboat builder
Marlow Hunter
Sailboat designer
Country
United States
Construction
Hull and deck: GRP (glass reinforced polyester)
First built hull
1984
Last built hull
1987
Appendages
Keel : fin without bulb
Helm
Single tiller
Rudder
Single transom hung rudder
Unsinkable
No
Trailerable
No
 
Main dimensionsHunter 25.5 Deep draft
Hull length
25’ 7”7.8 m
Waterline length
22’ 1”6.73 m
Beam (width)
9’ 1”2.77 m
Draft
4’ 6”1.37 m
Mast height from DWL
34’ 4”10.44 m
Light displacement (MLC)
4500 lb2041 kg
Ballast weight
1799 lb816 kg
 
Rig and sailsHunter 25.5 Deep draft
Upwind sail area
283 ft²26.25 m²
I
 iFore triangle height (from mast foot to fore stay top attachment)
30’9.14 m
J
 iFore triangle base (from mast foot to bottom of forestay)
10’3.05 m
P
 iMainsail hoist measurement (from tack to head)
26’ 5”8.05 m
E
 iMainsail foot measurement (from tack to clew)
10’3.05 m
Rigging type
Sloop Marconi masthead
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
1
Spreaders angle
Swept-back
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire continuous
 
PerformancesHunter 25.5 Deep draft
Upwind sail area to displacement
 iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.

The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size.

Upwind: under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 25 it indicates a fast sailboat.
176 ft²/T16.31 m²/T
Displacement-length ratio (DLR)
 iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The DLR is obtained by dividing the boat's displacement in tons by the cube of one one-hundredth of the waterline length (in feet).
The DLR can be used to compare the relative mass of different sailboats no matter what their length:

a DLR less than 180 is indicative of a really light sailboat (race boat made for planning), while a DLR greater than 300 is indicative of a heavy cruising sailboat.
190
Ballast ratio
 iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared.

The higher the ballast ratio is, the greater is the stability.
40 %
Critical hull speed
 iAs a ship moves in the water, it creates standing waves that oppose its movement. This effect increases dramatically the resistance when the boat reaches a speed-length ratio (speed-length ratio is the ratio between the speed in knots and the square root of the waterline length in feet) of about 1.2 (corresponding to a Froude Number of 0.35) . This very sharp rise in resistance, between speed-length ratio of 1.2 to 1.5, is insurmountable for heavy sailboats and so becomes an apparent barrier. This leads to the concept of "hull speed".
The hull speed is obtained by multiplying the square root of the waterline length (in feet) by 1.34.
6.30 knots
 
Auxiliary engineHunter 25.5 Deep draft
Engine(s)
1 inboard engine
 
Accommodations and layoutHunter 25.5 Deep draft
Cockpit
Closed aft cockpit
Cabin(s)
2
Berth(s) (min./max.)
4 / 7
Head(s)
1
Freshwater tank capacity
34.9 gal132 liters
Maximum headroom
6’ 6”1.98 m
 
SaloonHunter 25.5 Deep draft
Maximum headroom
5’ 6”1.68 m
 
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