Fill what you know from your source. Blank fields are fine — never guess a number. Everything goes to a moderation queue where a moderator checks it against the sources you cite before it enters the official database.
Boat identity
Which MODEL is this? The wiki catalogues models, not individual boats — use the exact spelling from your source.
Leave blank if there is only one version.
Texel rates open / beach cats (trampoline, no cabin) with a fixed crew weight and a flat 4% no-board penalty; cabin multihulls use a length-based crew weight and a draft-based board factor.
Dimensions
All in metres. Leave anything you don't know blank — never guess.
Width of ONE hull, not both together
Distance between the centrelines of the two hulls
Height of the deck between the hulls above the water
Drives the official Texel no-board correction. Daggerboard / centreboard = no penalty; fixed keel or no board = small rating penalty.
Weights & sail
Metric: kg, m², kW. "Light" = empty boat (no crew, no cargo).
Systems & interior
Optional — leave unknowns blank.
All engines combined — e.g. two 30 kW engines = 60
Sources & you
Every number needs a source. This is what makes the database trustworthy.