The phrase "a freeboard" is correct and usable in written English.
It can be used in contexts related to maritime or engineering, specifically referring to the distance from the waterline to the upper deck level of a ship or boat.
Example: "The vessel's design includes a freeboard that ensures stability in rough seas."
Alternatives: "a deck height" or "a safety margin".
The charge density of entrained particles in the freeboard was determined by a freeboard sampler constructed as a Faraday cup.
So they reinforced the largest of the boats, the James Caird, which was all of 22 feet long, with a freeboard of just over 2 feet, and got ready to sail for help.
For many years, the largest reliably measured Antarctic iceberg was the one first observed off Clarence Island (one of the South Shetland Islands) by the whale catcher Odd I in 1927; it was 180 km (110 miles) long, was approximately square, and possessed a freeboard of 30 40 metres (100 130 feet).
A typical newly calved iceberg of this type has a diameter that ranges from several kilometres to tens of kilometres, a thickness of 200 400 metres (660 1,320 feet), and a freeboard, or the height of the "berg" above the waterline, of 30 50 metres (100 160 feet).
The largest recorded Arctic iceberg (excluding ice islands) was observed off Baffin Island in 1882; it was 13 km (8 miles) long by 6 km (4 miles) wide and possessed a freeboard, or the height of the berg above the waterline, of 20 metres (65 feet).
The design called for a freeboard of 8.89 m forward, 6.24 m amidships and 6.49 m aft.
An International Load Line was adopted by 54 nations in 1930, and in 1968 a new line, permitting a smaller freeboard (hull above waterline) for the new, larger ships, went into effect.
By comparison, these ships were a knot slower and had a lower freeboard, so they did not perform as well in heavy seas.
The combustor section has an overall dimensions of (1~hbox {m}times 1~hbox {m}times 5~hbox {m}) high and consists of a fluidized bed modules, a transition section, and an extended freeboard section.
On a light canoe (such as this one) with a low freeboard, it's best to keep the center of gravity as low in the boat as possible.
In February 1909, the Navy requested a revised design from SECN to incorporate several alterations, including an increased freeboard to improve seakeeping, an increased height and length of the main belt armor, and the addition of individual rangefinders for each gun turret.
