0 0 STEVENSON SCREEN
1 1 MARINE STEVENSON SCREEN
2 2 CYLINDRICAL SECTION PLATE SHIELD
3 3 CONCENTRIC TUBE
4 4 RECTANGULAR SECTION SHIELD
5 5 SQUARE SECTION SHIELD
6 6 TRIANGULAR SECTION SHIELD
7 7 OPEN COVERED LEAN-TO
8 8 OPEN COVERED INVERTED V ROOF
9 9 INTEGRATED (E.G. CHILLED MIRROR)
15 15 MISSING VALUE
