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The DIY Mermaid was designed as an entry for the sailboat-building competition, organised by Stanley Tools in 1961, and the first DIY Mermaid was built by the designer on the living room floor. The Do-it-yourself magazine [ 2 ] started serialising the construction drawings and instructions in June 1963, whereby the DIY Mermaid could be built ...
The length of the distance line used is dependent on the plan for the dive. An open water diver using the distance line only for a surface marker buoy may only need 50 metres (160 feet), whereas a cave diver may use multiple reels of lengths from 25 ft (7.6 m) to 1000+ ft (300 m).
The one sheet boat (OSB, cf. oriented strand board) is an outgrowth of the stitch and glue technique. The OSB is a boat that can be built using a single sheet of 4 foot by 8 foot plywood (1.22 m × 2.44 m). Some additional wood is often used, for supports, chines, or as a transom, though some can be built entirely with the sheet of plywood ...
Lofting is the transfer of a Lines Plan to a Full-Sized Plan. This helps to assure that the boat will be accurate in its layout and pleasing in appearance. There are many methods to loft a set of plans. Generally, boat building books have a detailed description of the lofting process, beyond the scope of this article.
A recreational diver may expect many of these items to be arranged by the service provider (the dive boat operator, shop, or school providing thansport to the dive site and organising the dive). Technical diving is less constrained by legislation than professional diving, but risk analysis may indicate similar equipment to be necessary or ...
Shot, line and reel on dive boat. The shot is deployed, generally from a boat, after the dive site is located using position fixing such as GPS and an echo sounder. Shots are more difficult to use in strong currents. The weight may drag along the seabed especially if the divers pull on the line as they descend.
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Carvel built or carvel planking is a method of boat building in which hull planks are laid edge to edge and fastened to a robust frame, thereby forming a smooth surface. Traditionally the planks are neither attached to, nor slotted into, each other, having only a caulking sealant between the planks to keep water out.