Assess students' ability to apply density and buoyancy principles to design and test a small model boat that must carry a specified load. Tasks include calculating required displaced volume from the load mass and material densities (Archimedes' principle), choosing materials and a hull shape, estimating freeboard and stability with a safety margin, and outlining a simple test procedure to verify floatation and load capacity; problems may involve unit conversions, basic volume calculations for simple shapes, and interpretation of experimental results.