To raise or lower ships passing through the Panama Canal (a similar process is applied to any kind of ships passing through any canal) we use "locks". You've seen diagrams of an "air lock" in a spacecraft; a chamber that the astronauts can enter, and air is added or removed, and then go through the other door. The original "locks" do the same thing, only with water.
A vessel enters the lock through the gate at one end. The gate is closed, and water is pumped into the lock. As the water level is raised, the ship is lifted. When the water in the lock matches the water level in the next leg of the canal, the other gate is opened, and the vessel exits the lock.
Locks are only needed when the ships need to be raised and lowered in altitude because of the terrain the canal crosses.
The main channels that cross the mountains of Panama are well above sea level. Ships are raised to reach them, then lowered back down at the other end. To dig a sea-level canal would have required the removal of an impossibly large amount of rock.
A section of a waterway in which ships are raised or lowered is called a lock. Locks are integral components of a canal system, allowing vessels to navigate changes in elevation by managing water levels. They facilitate safe and efficient passage through areas with varying topography.
locks
Same things sailors did on other ships. Repaired ship, pumped water that leaked into the ship, raised and lowered sails, steered ship, maintained weapons, cooked food, raised/ lowered anchor, kept a lookout for other ships, navigated the ship.
I think that you mean 'lock' and not loch. A lock on a canal or river allows water level to be raised or lowered so that boats can go upstream or downstream.
the flag is raised and lowered when you first walk in the flag is raised and lowered when you first walk in
an adjustable chair can be raised and lowered.
First it is raised and then it is lowered. short and simple.
To raise or lower ships passing through the Panama Canal (a similar process is applied to any kind of ships passing through any canal) we use "locks". You've seen diagrams of an "air lock" in a spacecraft; a chamber that the astronauts can enter, and air is added or removed, and then go through the other door. The original "locks" do the same thing, only with water. A vessel enters the lock through the gate at one end. The gate is closed, and water is pumped into the lock. As the water level is raised, the ship is lifted. When the water in the lock matches the water level in the next leg of the canal, the other gate is opened, and the vessel exits the lock.
A group of joined locks on a canal is called a lock flight. This term refers to a series of interconnected locks that allow boats to be raised or lowered to navigate changes in water levels along the canal.
Raised.