Questions and Answers
What is the purpose of seasonal Load Line marks?
To indicate the maximum draft a vessel can safely have in different seasons
What is the purpose of Fresh water marks?
To indicate the maximum draft allowance due to water density
Where did the concept of the Plimsoll mark originate?
England
What did Samuel Plimsoll devise to calculate the capacity of a ship?
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Why were overloaded merchant ships referred to as 'coffin ships' by sailors in the 1800s?
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Study Notes
Load Line Marks
- Seasonal Load Line marks indicate the safe load limits of a ship based on the density of the water it operates in, with separate marks for saltwater, freshwater, and tropical freshwater.
- Fresh water marks indicate the maximum load a ship can carry in freshwater, which is less dense than saltwater, to prevent overloading.
The Plimsoll Mark
- The concept of the Plimsoll mark originated in the UK in the 1870s.
- Samuel Plimsoll, a British politician, devised a system to calculate the capacity of a ship, which led to the development of the Plimsoll mark.
Overloaded Merchant Ships
- Overloaded merchant ships in the 1800s were referred to as 'coffin ships' by sailors due to the high risk of sinking and loss of life.
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