1. Watertightness is achieved by thrust from hydraulic rams acting on the other end of the tank.

2. Household Basketry objects consist primarily of receptacles for preparing and serving food and vary widely in dimension, shape, and watertightness

3. The men in San Francisco secured the ship for watertightness and began looking for opportunities to fight back.

4. Ventilation and the watertightness of the ventilation system were improved, while internal passageways within the machinery spaces were redesigned and the communications system made more robust.

5. The present invention relates to a ventilation apparatus for a sliding window, and more particularly, to a ventilation apparatus for a sliding window, which has improved easiness of mounting/demounting, enhanced airtightness/watertightness and thermal insulation, and improved shielding against external contaminants.

6. Describes how watertightness is achieved at the Coamings and cross joints; describes the cleating arrangements for the hatches in 1.5.1; describes the arrangement of portable beams, wooden hatch covers and tarpaulins; sketches an oiltight hatch cover; describes roller, multi-angle, pedestal and Panama fairleads