Find the Displacement of the ship whose
length is 500 ft,
mean draft is 20 ft,
block coefficient is .7
in sea water
and in fresh water.

Sea Water Solving:
Displacement = L x B x D x C / 35 = tons
Displacement = 500 ft x 40 ft x 20 ft x .7 / 35 = tons
Displacement = 20,000 ft x 20 ft x .7 / 35 = tons
Displacement = 400,000 ft x .7 /35 = tons
Displacement = 280,000 / 35 = tons
Displacement = 8,000 tons

Fresh Water

Solving:
Displacement = L x B x D x C / 36 = tons
Displacement = 500 ft x 40 ft x 20 ft x .7 / 36 = tons
Displacement = 20,000 ft x 20 ft x .7 / 36 = tons
Displacement = 400,000 ft x .7 /36 = tons
Displacement = 280,000 / 36 = tons
Displacement = 7777.78 tons

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A vessel 400 feet long, 30 feet beam (breadth), and 25 feet mean draft displace 5,143 tons in sea water.
Find her block coefficient and state what type of vessel you think she might be?

So the formula for solving Block Coefficient is:
C = Displacement x 35 / L x B x D (sea water)
C

= Displacement x 36 / L x B x D (fresh water)

Since the problem is exclusively only for sea water, here is how to solve:

C = Displacement x 35 / L x B x D
C = 5,143 x 35 / 400 x 30 x 25
C = 180,005 / 400 x 30 x 25
C = 180,005 / 12,000 x 25
C = 180,005 / 300,000
C = 0.600

C = 0.6 Block Coefficient of that ship floating in Sea Water

http://expertscolumn.com/content/seamanship-how-find-ship-or-vessel-displacement-sea-water-and-fresh-water

Read the Block Coefficient at the upper most portion of that article link

That if the coefficient is .6, then that type of vessel is merely a Fast Passenger Steamer.

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http://expertscolumn.com/content/seamanship-ship-or-vessel-displacement-problems-and-solving-regarding-draft-and-its-beam-bre Click the link to read different problem and solve if the problem is regarding to ship’s Draft and its Beam (Breadth)

On that page regarding to its problem, the reader will forced to calculate first the ship’s Main Draft before solving her Beam or Breadth.

### Article Written By mantis36

mantis36 is a blogger at Expertscolumn.com

Last updated on 30-07-2016 8K