Columbia 43 Numbers

Here are some numbers for the Columbia 43. They are all for the Mark I unless otherwise indicated.
  • Length: 43 feet 3 inches
  • Beam: 12 feet 4 inches
  • Draft: 6 feet 11 inches
  • Waterline Length: 32 feet 8 inches
  • Displacement: 22,200 pounds (one source says 18,900 pounds)
  • Ballast: 9,500 pounds
  • Sail Area: 806 square feet
  • Sail Area/Displacement: 18.24
  • Ballast/Displacement: 50.26 percent
  • Displacement/Length: 257.49
  • Theoretical Hull Speed: 7.5 knots 
  • Vertical Clearance: 58 feet 4 inches
  • Built between 1969 and 1974
  • Number built: 153
  • PHRF number: 102 (Columbia 43 Mark III have a PHRF number of 96)

Columbia 43 Mark I Rig Dimensions (feet/meters)
I: 52.9/16.11 J: 17.7/5.41 P: 44.9/13.68 E: 15.0/4.56
ISP: 52.9/16.11 JSP: 17.7/5.41 Py: Ey:

Estimated Sail Areas (square feet/square meters)
Mainsail: 373.1 / 34.66 155% Genoa: 774.2 / 71.93 Cruising Spin: 1548.5 / 143.86
135% Genoa: 675.7 / 62.77 100% Jib: 469.2 / 43.59 Racing Spin: 1689.2 / 156.93

How to Calculate Sail Areas
The following formulas will give you approximate sail areas:
Mainsail = (P x E) / 1.8 (1.6 for racing profile mainsails)
155% Genoa = (( J x I ) / 2) x 1.65
135% Genoa = (( J x I ) / 2) x 1.44
100% Jib = ( I x J ) / 2
Racing Symmetrical Spinnaker = 1.8 x J x I
Racing Asymmetrical Spinnaker = 1.8 x J x I
Cruising Asymmetrical Spinnaker = 1.65 x J x I

Formula Definitions
I is measured along the front of mast from the genoa halyard to the main deck. The main deck is where the deck would be if there were no deckhouse.
J is the base of the foretriangle measured along the deck from the headstay pin to the front of the mast.
P is the luff length of the mainsail, measured along the aft face of the mast from the top of the boom to the highest point that the mainsail can be hoisted, or to the black band if there is one.
E is the foot length of the mainsail, measured along the boom from the aft face of the mast to the outermost point on the boom to which the main can be pulled, or to the black band if there is one..
ISP is similar to I. It is measured from the highest spinnaker halyard to the main deck.
JSP is the length of the spinnaker pole or the distance from the forward end of the bowsprit (fully extended) to the front face of the mast.
Py and Ey, respectively, are the luff length and foot length of the mizzen of a yawl or ketch, measured in the same way as for the mainsail.
Iy is the measurement from the staysail halyard to the main deck.
Jy is the measurement from the staysail stay pin to the front face of the mast.
LP is the shortest distance between the clew and the luff of the genoa.