Catalina 309 Fin keel

Sailboat specifications

The Catalina 309 is a 31’ (9.45m) cruising sailboat designed by Gerry Douglas (United States). She was built since 2005 (and now discontinued) by Catalina Yachts (United States). The Fin keel version offers a deeper L-shaped keel bringing extra performance especially upwind. She has been awarded "2007 - Cruising World - Boat of the Year: Domestic Boat" and "2007 - Cruising World - Boat of the Year: Small Cruiser ".

The Catalina 309 is as well listed, on Boat-Specs.com, in Wing keel version (see all the versions compared).

Catalina 309's main features

Model

Catalina 309

Version

Fin keel

Hull type

Monohull

Category

Cruising sailboat

Sailboat builder

Catalina Yachts

Sailboat designer

Gerry Douglas

Country

United States

Construction

Hull and deck: GRP (glass reinforced polyester)

First built hull

2005

Last built hull

Discontinued

Award(s)

2007: Cruising World - Boat of the Year: Domestic Boat
2007: Cruising World - Boat of the Year: Small Cruiser

Appendages

Keel : L-shaped keel (with bulb)

Helm

Single helm wheel

Rudder

Single spade rudder

Unsinkable

Trailerable

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)

About

71 000 €

(2006)

Catalina 309's main dimensions

Overall length: 32’ 8”9.98 m
Hull length: 31’9.45 m
Waterline length: 26’ 6”8.08 m
Beam (width): 11’ 6”3.51 m
Draft: 6’ 2”1.9 m
Mast height from D_WL: 48’ 4”14.71 m
Light displacement (M_LC): 9800 lb4445 kg
Ballast weight: 3999 lb1814 kg
Ballast type: Lead

Catalina 309's rig and sails

Upwind sail area: 523 ft²48.6 m²
I iFore triangle height (from mast foot to fore stay top attachment): 42’ 8”13.03 m
J iFore triangle base (from mast foot to bottom of forestay): 12’3.66 m
P iMainsail hoist measurement (from tack to head): 38’ 8”11.81 m
E iMainsail foot measurement (from tack to clew): 13’ 8”4.19 m
Rigging type: Sloop Marconi 19/20
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: 0 °
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire

Catalina 309'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.: 194 ft²/T17.98 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.: 239
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