46 CFR §44.340

1. (a)Each hopper dredge assigned a working freeboard may be operated at drafts from the normal freeboard to the working freeboard if the—
   1. (1)Seas are not more than 10 feet;
   2. (2)Winds are not more than 35 knots;
   3. (3)Area of operation is not more than 20 nautical miles (37 kilometers) from the mouth of a harbor of safe refuge; and
   4. (4)Specific gravity of the spoil carried is not more than the highest specific gravity of spoil used in the stability calculations required by subchapter S of this chapter.
2. (b)The Assigning Authority designates on the face of the dredge's load line certificate—
   1. (1)Each restriction contained in paragraph (a)(1) through (a)(3) of this section; and
   2. (2)The maximum specific gravity of the spoils allowed to be carried.