[Code of Federal Regulations] [Title 46, Volume 4] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR112.55-10] [Page 262] TITLE 46_SHIPPING (This book contains parts 90 to 139) CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 112_EMERGENCY LIGHTING AND POWER SYSTEMS--Table of Contents Subpart 112.55_Storage Battery Installation Sec. 112.55-10 Storage battery charging. (a) Each storage battery installation for emergency lighting and power, and starting batteries for an emergency diesel or gas turbine driven generator set, must have apparatus to automatically maintain the battery fully charged. (b) When the ship's service generating plant is available, the battery must have a continuous trickle charge, except that after discharge the battery must be charged automatically at a higher rate. (c) Charging operations must not cause an absence of battery power. (d) There must be instruments to show the rate of charge.