Both propellers are driven via a bevel gear system through the underwater gearbox arrangement. The forward unit operates as a pulling propeller and attains a very high efficiency level.
You can help confirm this entry by contributing facts, media, and other evidence of notability and mutation. The image of the happy-looking dog wearing a propeller hat in the meme originally came from ...
Research has improved simulating and measuring underwater-radiated noise (URN) and paved the way for predictive analysis ... enabling designers and builders to model and predict the noise created by ...