[Code of Federal Regulations] [Title 46, Volume 2] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR45.37] [Page 76] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 45_GREAT LAKES LOAD LINES--Table of Contents Subpart B_Load Line Marks Sec. 45.37 Salt water load lines. Each vessel that operates in the salt water of the St. Lawrence River must-- (a) Be marked with the summer (S), midsummer (MS), intermediate (I) and winter (W) load line marks under Sec. 45.77 for salt water; and (b) Be marked with the letters ``FW'' above the fresh water marks and the letters ``SW'' above the salt water marks as described in figure 2.