1. Leverage: The helm's shape provides leverage for the helmsman to steer the ship. The long arms (the spokes) multiply the force the helmsman applies, allowing them to easily turn the rudder, even with large ships.
2. Ergonomic Design: The wheel shape is comfortable and intuitive for the helmsman to grip and rotate. It allows for a natural, comfortable grip and easy movement.
3. Stability: The round shape of the helm provides stability, preventing it from easily tipping over or becoming unbalanced when rotated.
4. Visual Cues: The shape and position of the helm provide visual cues to the helmsman, allowing them to easily determine the ship's heading and the direction of the rudder.
5. Historical Influence: While modern helms are often more streamlined, the classic wheel shape is deeply rooted in nautical history. This design has proven successful for centuries and remains a familiar symbol of ships and seafaring.
In Summary: The helm's shape is a combination of functionality and tradition, designed for optimal leverage, comfort, stability, visual cues, and historical significance.