The gyroscopic effect plays a significant role in the stability and maneuverability of naval ships. When a ship is in motion, it is subject to various forces such as wind, waves, and currents, which can cause it to roll, pitch, or steer.

 First lets understand some terms that will be used here:

• Bow is the front or the front end
• Stern or aft is the rear end
• Starboard is the right-handed side when looking from the stern
• Port is the left-handed side when looking from the stern
• Steering is turning on the side when viewing from the top
• Pitching is limited angular motion of the ship about the transverses axis
• Rolling is limited angular motion of the ship about the longitudinal axis.

Let the plane of the spin of the rotor and other rotating masses be horizontal and across the breath of the ship.

Gyroscopic effect on Steering:

When the ship turn left the angular momentum, the reaction couple tends to raise the bow and lower the stern. On turning right, the reaction couple is reversed so that bow is lowered and the stern is raised.

Gyroscopic effect on Pitching:

When the bow is rising, the reaction couple is clockwise on the viewing from top and thus the ship would move towards right or the starboard side. Similarly, when the bow is lowered, the ship turn towards left or port side.

Gyroscopic effect on Rolling:

As the axes of the rolling of the ship and of the rotor are parallel, there is no pression of the axis of the spin and thus there is no gyroscopic effect.

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