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Catalina 310 Fin keel

Sailboat specifications

The Catalina 310 is a 31’1” (9.49m) cruising sailboat designed by Gerry Douglas (United States). She was built between 1999 and 2012 by Catalina Yachts (United States). The Fin keel version offers a deeper L-shaped keel bringing extra performance especially upwind. She has been awarded "2000 - Cruising World - Boat of the Year: Pocket Cruiser ".

The Catalina 310 is as well listed, on, in Wing keel version (see all the versions compared).

Catalina 310's main features

Catalina 310
Fin keel
Hull type
Cruising sailboat
Sailboat builder
Sailboat designer
United States
Hull and deck: GRP (glass reinforced polyester)
First built hull
Last built hull
  • 2000: Cruising World - Boat of the Year: Pocket Cruiser
    Keel : L-shaped keel (with bulb)
    Single helm wheel
    Single spade rudder
    EC design category
     iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions)

    A: Wind < force 9, Waves < 10m
    B: Wind < force 8, Waves < 8m
    C: Wind < force 6, Waves < 4m
    D: Wind < force 4, Waves < 0,5m
    Standard public price ex. VAT (indicative only)

    Catalina 310's main dimensions

    Hull length
    31’ 1”9.49 m
    Waterline length
    26’ 6”8.08 m
    Beam (width)
    11’ 6”3.51 m
    5’ 8”1.75 m
    Light displacement (MLC)
    10701 lb4854 kg
    Ballast weight
    4400 lb1996 kg
    Ballast type

    Catalina 310's rig and sails

    Upwind sail area
    490 ft²45.52 m²
    Rigging type
    Sloop Marconi masthead
    Mast configuration
    Keel stepped mast
    Rotating spars
    Number of levels of spreaders
    Spreaders angle
    0 °
    Spars construction
    Aluminum spars
    Standing rigging
    1x19 strand wire

    Catalina 310's performances

    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.
    171 ft²/T15.88 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.
    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.
    41 %
    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.
    6.90 knots

    Catalina 310's auxiliary engine

    1 inboard engine
    Engine(s) power
    26 HP
    Fuel type
    Fuel tank capacity
    20.1 gal76 liters

    Catalina 310's accommodations and layout

    Open aft cockpit
    Berth(s) (min./max.)
    4 / 6
    Freshwater tank capacity
    54.9 gal208 liters
    Holding tank capacity
    20.1 gal76 liters
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