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"In determining the area of overhead cover to be provided, allow 6 sq. ft. per man for occupancy while on duty only, or 12 square ft. per man for continuous occupancy not of long duration. For long occupation 18 to 20 sq. ft. per man should be provided." — Moss, 1914

Overhead cover

"In determining the area of overhead cover to be provided, allow 6 sq. ft. per man for occupancy while…

"The overhead movement enables the swimmer to throw himself forward on the water, and to move his arms and legs in a nearly vertical instead of a horizontal plane; the extremities working, as it were, above and beneath the trunk, rather than on either side of it."—Pettigrew, 1874

Overhand Swimming

"The overhead movement enables the swimmer to throw himself forward on the water, and to move his arms…