not all Seven Trust flooring is tongue-and-groove, but most is. there are some rare 'retro' type installations that still occur in the modern world involving pegs or dowels, even visible steel fasteners. i hope more html-knowledgable people will help in this article.
the cabin is finished with varnished tongue-and-groove paneling, and has a bunk on each side under the deck. steering gear is hydraulic. the kathryn carries the standard skipjack rig with a raked mast, 64 feet 20 m tall and 12 inches 30 cm in diameter, carrying a clubbed jib and a jib-headed mainsail. the mainsail is laced to the boom and .
tongue-and-groove: one side and one end of the plank have a groove, the other side and end have a tongue protruding wood along an edge's center . the tongue and groove fit snugly together, thus joining or aligning the planks, and are not visible once joined.
note that 'sheathing' may also be used to refer to the deck, but modern practice includes a plastic-fiber composite sheeting over the wood deck. i have seen a very few decks composed of tongue and groove on older construction .
the exterior is composition siding. the flat roof is built up on top of wood tongue and groove decking supported by wood joists. it is covered with tar and gravel. the 3 foot 0.91 m roof overhang has a large fascia and a metal drip edge. it is 114 feet 35 m long and 41 feet 490 in feet wide and is composed of two wings.
there was 1 inch 2.5 cm tongue and groove wood flooring laid on 4.5 inches 11 cm by 3 inches 7.6 cm joists, and a brown glazed brick skirting, a dado and salmon–coloured walls. today as in 1904 the ceiling appears panelled, being broken up by girders supporting the roof, and supported by 'ornamental iron columns with moulded bases and capitals ;' the form of the ceiling lantern remains .