A low-aspect fin (wide but not too deep) is required on this big yacht to minimize draft; otherwise the fin would project beneath the keel. High-aspect fins (narrow and deep) are more efficient, because of their longer leading edge, but not always practical.
If you missed this one at the Ft. Lauderdale International Boat Show, you may need to hunt her up at the upcoming shows in Miami. Because she has to be seen in person to be believed. Check out the latest Magnum here. ▶