Using between 5 and 6 sheets of 6mm ply the Sand Martin uses simple stitch and tape technology in her construction. She can be fitted out in a number of different ways but the standard arrangement shows two thwarts with side benches aft and a foredeck with stowage space below. Weight will be approx. 120 lbs (54kg) and she can take outboard engines between 2 and 15 hp. With a beam of 4'11" (1.49m), she has plenty of room for fishing and is a very stable craft.

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12' Sand Martin Particulars |
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| LOA | 12'2" | 3.7m |
| Beam | 4' 11" | 1.5m |
| Hull Mid Depth | 1'10" | 0.55m |
| Draft | 6" | 0.15m |
| Approx. Dry Weight | 120 lbs | 54 kg |
| Engine | 15 hp + outboard | |
| Speed | 15 knots with 10 hp | |
| Hull Shape | V bottom single chine | |
| Construction Methods | Stitch and tape | |
| Major plywood requirements for hull | 6 x 6mm sheets | |
| Guidance Use | Inshore/estuary for 5-6 adults | |
| Drawing/Design Package | 2 x A1 drawings + 6 x A4 instruction/spec sheets | |
| Additions and alterations included with the plans | ||