Some pictures

In this first picture, we can see the 2 microprocessor Chameleon enclosures (http://www.sparkfun.com/products/9682), along the notebook, the waterproof monitor, the gyrocompass, the small GPS at the center and one of the SeaTalk repeaters.The small black housing at the bottom is home for the SeaTalk interface circuit. By design, there are no buttons or switches on the enclosures, only connectors. The field installable round connectors are Conxall Mini-Con-X available at Digi-Key.

The next one is a close-up of the first enclosure, with the MAVRIC-IIB controller, the USB converter at the right and the 8 V regulator at the bottom.

In the other enlosure, we can see the Olimex board, along 2 voltage regulators (5 V and 3.3V), and the small logic level converter between the two.