Which fixed pitch thruster configuration would produce the least noise effects on the acoustic position reference system?

The configuration that would produce the least noise effects on the acoustic position reference system is one that utilizes multiple thrusters running at lower capacities. Operating six thrusters at 15% of their rated thrust allows for a more distributed thrust output, which generally leads to reduced noise generation compared to fewer thrusters running at a higher output.

In this scenario, the lower percentage of thrust results in less turbulence and reduced cavitation effects, which are significant contributors to underwater noise. Additionally, having more thrusters operating at lower power helps to balance the forces and minimize the vibrations transferred to the surrounding water, further decreasing the acoustic impact.

Utilizing a higher number of thrusters allows for more even load distribution, which contributes to smoother operation and reduced load stress on each thruster. This can also mitigate the chances of producing high-frequency noises, which can interfere with the acoustic positioning systems.

In contrast, options that involve fewer thrusters running at higher capacities would likely generate more noise due to increased water displacement and turbulence, creating higher levels of acoustic disturbance that could affect the performance of sensors used for positioning.

By understanding the relationship between thruster configuration, operational capacity, and noise production, it's clear why a configuration employing six thrusters at lower thrust levels is optimal for minimizing the