The instructor made Douglas a good swimmer by using ropes and belts to assist him in the learning process. This method allowed Douglas to develop his swimming skills gradually and gain confidence in the water. Let's explore how the instructor used ropes and belts to transform Douglas into a proficient swimmer.

1. Initial Training:
At the beginning of the training, the instructor would have introduced Douglas to the basic techniques and principles of swimming. This would have included teaching him how to float, kick, and move his arms in the water. These initial lessons would have helped Douglas understand the fundamentals of swimming.

2. Building Confidence:
To build Douglas's confidence in the water, the instructor would have used ropes and belts as safety devices. The ropes and belts would have been attached to Douglas's body and held by the instructor or assistant. This ensured that Douglas could practice swimming without the fear of sinking or drowning. The support provided by the ropes and belts allowed him to focus on refining his swimming techniques and gradually gaining confidence in the water.

3. Gradual Progression:
As Douglas became more comfortable and proficient in the water, the instructor would have gradually reduced the assistance provided by the ropes and belts. This progression allowed Douglas to develop his swimming skills in a controlled and safe manner. By gradually decreasing the reliance on the ropes and belts, Douglas was able to build his strength, coordination, and stamina while swimming.

4. Correcting Technique:
During the training sessions, the instructor would have closely observed Douglas's swimming technique and provided guidance and corrections as necessary. The ropes and belts would have allowed the instructor to maintain proximity to Douglas, making it easier to provide real-time feedback and make necessary adjustments to his swimming style. This personalized attention helped Douglas refine his technique and improve his overall swimming performance.

5. Confidence in Deep Water:
Once Douglas had acquired a certain level of proficiency in shallow water, the instructor would have gradually introduced him to deeper water. The ropes and belts would have continued to provide support and reassurance during this transition. By experiencing swimming in deeper water with the assistance of the ropes and belts, Douglas would have gained the confidence to swim independently in various water depths.

In summary, the instructor used ropes and belts to provide support, build confidence, and gradually develop Douglas's swimming skills. This method allowed Douglas to learn swimming techniques effectively, refine his style, and ultimately become a good swimmer.