iv RAYDATA Installation and Operation HandbookChapter 3: Getting Started ............................................... 173.1 Introduction ..................................................................... 173.2 Using the Keys ................................................................ 183.3 Turning the RayData On and Off ...................................... 183.4 The Display ..................................................................... 19Data Value ...................................................................... 19Text Description .............................................................. 19Trend Arrow .................................................................... 20Additional Information ...................................................... 203.5 Changing the Information Displayed ................................. 203.6 Changing the Lighting ...................................................... 223.7 Using the Locked Heading Facility .................................... 233.8 Man Overboard (MOB) .................................................... 24Sending an MOB Warning ............................................... 24Cancelling an MOB Warning ............................................ 253.9 Key Functions ................................................................. 25Chapter 4: Setup and Calibration .................................... 274.1 Introduction ..................................................................... 274.2 Using the Setup Pages .................................................... 284.3 Setup Options ................................................................. 28Depth Offset .................................................................... 30Sounder Control .............................................................. 31Response Level .............................................................. 31Mode .............................................................................. 314.4 Speed Calibration ............................................................ 31Automatic Calibration ....................................................... 32Manual Calibration........................................................... 33