BOYSHP

1. conical/nun/ogival: the upper part of the body above the water-line, or the greater part of the superstructure, has approximately the shape or the appearance of a pointed cone with the point upwards.
2. can/cylindrical: the upper part of the body above the water-line, or the greater part of the superstructure, has the shape of a cylinder, or a truncated cone that approximates to a cylinder, with a flat end uppermost.
3. spherical: the upper part of the body above the water-line, or the greater part of the superstructure, has the shape of a part of a sphere.
4. pillar: the upper part of the body above the water-line, or the greater part of the superstructure is a narrow vertical structure, pillar or lattice tower.
5. spar/spindle: the upper part of the body above the water-line, or the greater part of the superstructure, has the form of a pole, or of a very long cylinder, floating upright.
6. barrel: the upper part of the body above the water-line, or the greater part of the superstructure, has the form of a barrel or cylinder floating horizontally.
7. super-buoy: a very large buoy, generally more than 5m in diameter.
8. ice buoy: a specially constructed shuttle shaped buoy which is used in ice conditions.