Low Tide

Yacht Designer Tad Roberts' Web Log

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Sheerline Problems

Many think the sheer is the most important line on any boat. Get it right and all else is forgiven, get it wrong and nothing else matters. To some extent this is true, this one line in 3D space, must be attractive when viewed from any angle. If it’s filled with humps[.....]

Change in Stability with Dinghy Aboard

I’m often asked about the advisability of adding a heavy dinghy stored on the roof, people wonder how much difference this will make to stability. The answer always involves a lot of questioning about the particulars of the boat and load condition. So today I made a study of a typical 1985 “trawler”[.....]

The Cogge Nonsuch

In 1916 Douglas P. Urry was serving (probably RCN) in the North Sea. While reading off watch he came across mention of “the Cogge Thomas,” and started to wonder what that ship might look like. He wrote to his brother, F. Wavell Urry, in Vancouver, and Wavell started sketching. These drawings are the result, the[.....]

Sakamoto Brothers Boatbuilding at Osland

Above is the beautiful gillnetter Bee, built 1933 at Osland. She might be double-ended or round-sterned, but hard-chined (vee-bottom) which is very unusual. It’s launching day. There’s another boatshop in the background, along with one or two houses and a substantial deer fence. This may be one of the earliest streamlined pilothouses. Photo from the[.....]

Gillnetters at Cassiar Cannery

Storing gillnetters ashore for the winter, at Cassiar Cannery outside Prince Rupert. These were probably taken either before or during WWII, some of the boats have round front proper pilothouses, but many are still the little square one-man box. Also they all seem to have the outside horns on the stern roller, before the taller[.....]

Post Class Patrol Boats

Once again our Federal Government is selling off what I think are irreplaceable assets at a bargain price. Five of the 65′ x 17′ Post Class Patrol boats were built by Philbrook’s Boatyard in the early 1970’s. The next few days will see what I believe is the last one still in government service, the[.....]

CCG Hero Class and Safety Concerns

It should not come as any surprise that large, expensive, incredibly complex machines raise issues of competing interest. Union of Canadian Transportation Employees members are alleging un-addressed safety concerns on the CCG newest ships. Chronicle Herald Story here From the story it sounds like TC has been issuing operation certificates with promises[.....]

Stability of Canadian OFSV

CBC has just published a story CoastGuard Ship Redesign, outlining the discovery of apparent instability in the initial design of our new OFSV’s (Offshore Fisheries Science Vessel), three of which Seapan has under contract and the first under construction. This story seems like pot stirring coupled with the usual misinformation. These are large and[.....]

BC Handliner, Luoma Loon

Luoma Loon, BC Handliner built by the Luoma Brothers at Shack Island probably in the 1930’s. She’s 13′2″ x 4′ to the outside of her 1/2″ planking. 12 strakes of red cedar, six per side, on 1/2″ x 1″ bent frames spaced 6″. The Luomas built dozens of these between the 1920’s and 1940’s. At one[.....]

Gillnetters at Cassiar Cannery

Gillnetters at Cassiar cannery waiting for the season to start. All painted up, some of these are new boats, one or two built at the cannery and others built by Wahl’s in Prince Rupert. No chimneys so these boats had no heat. This was post Easthope, boats were running Chrysler Crown’s or Ace’s. The[.....]

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