Also known as FIV or cat AIDS, feline immunodeficiency virus is an infectious disease caused by a retrovirus belonging to the lentivirus family. It is in the same family as the feline leukemia virus (FeLV), and is similar to the HIV virus in humans. FIV infects both domesticated cats, lions, tigers, pumas and cheetahs.
This map only incorporates the wide-open throttle condition, but adding a third independent axis of throttle position can create a 3D performance map; it is noted that throttling directly affects efficiency via an inverse proportion, and maximum efficiency and minimum BSFC is realized at 100% throttle.
Trimming down the engines (or tucking them in, depending on how you prefer to describe it) lowers the bow and elevates the stern, lifting the boat out of the water more quickly. Trim tabs â standard on many offshore fishing boats â can further lower the bow on throttle-up, when needed.