Student: Daniel Williams
    Robot: APB
 Filename: APB.pdf (also included, APB.doc)

  Sensors:
  (2) microphone sensors that detect sudden vibrations in the hull, 
      utilizing an amplifier, comparator and D-FF.
  (2) water sensors which are basically water sensitive resistors.
  (1) sonar unit which is self contained and reports distance to object in
      increments from 0 to 5V.
  (1) Standard Communications DS100 depth sounder, which reports depth of water
      through a serial link and has range of 3' to 400'.

Behaviors:
  - Obstacle avoidance using microphones and sonar
  - Warning behavior if water is detected