Thousands of residents in Juneau, Alaska, are voting through next Tuesday on an initiative to ban any cruise ship with a capacity of over 250 passengers from docking in their city on Saturdays and the Fourth of July.
22.09.2024 - 18:43 / thepointsguy.com
Cruise ship stabilizers are features built into the ship to reduce its side-to-side motion (or roll). Though most cruise ships have a variety of active and passive design elements working to provide a smoother ride for passengers, the retractable wing-type stabilizers on the sides of the ship below the water line are the kind the average passenger commonly thinks about.
Let's explore how the various types of stabilizers work and how they help to improve your cruise.
The stabilizers that most often come to mind first are the fin-style stabilizers, which are considered active stabilizers because the captain must deploy them. When not deployed, they are fully retracted out of the way. This is particularly important when the ship docks or cruises in narrow channels.
I recently had the opportunity to visit the bridge on Celebrity Reflection during departure from the British Virgin Islands. Because the retraction of the stabilizer fins is so critical amid the multitude of small islands in the BVIs, the bridge team did not rely solely on high-tech instrumentation to keep them informed about the stabilizers.
They also had a large hand-printed note stuck on the wall above the windows in everyone's full view indicating whether the stabilizers were deployed or not — like you would use a "dirty" and "clean" note on your dishwasher at home. As we left the island chain and entered open water, the captain verbally gave the order to deploy the stabilizers and the sign was changed.
Stabilizer fins are easy to understand. As waves strike the sides of the ship, the fins help keep it from tipping too far to one side. Picture a tightrope walker carrying a pole for balance or gymnasts using their extended arms on the balance beam to stay centered and unwavering.
While stabilizer fins smooth out the ride for passengers, the downside is increased fuel usage. They also are not as effective at speeds below six knots (around 7 mph). Think of that like the wobbling of an airplane at the relatively slower speeds required for landing. The wings stabilize the plane effectively when it is at higher altitudes and higher speeds, but not so much when the plane must slow down. It's the same with cruise ship stabilizers.
Related: How is cruise ship speed measured, and how fast is a knot in miles per hour?
Beyond active stabilizer fins, bilge keel stabilizers have been a maritime standard for more than a century. First used in the late 1800s, these are internal pump and tank systems. Originally, they relied on stationary baffles to slow water movement in the tanks from side to side. Today, they are computer-controlled, using the weight and motion of water inside the tanks to match sea conditions and counterbalance the ship.
Some ships
Thousands of residents in Juneau, Alaska, are voting through next Tuesday on an initiative to ban any cruise ship with a capacity of over 250 passengers from docking in their city on Saturdays and the Fourth of July.
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