StacksVerified U.S. regulatory reference

46 CFR §153.409

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
When Table 1 refers to this section or requires a cargo to have a closed gauging system, the cargo's containment system must have a high level alarm:
  1. (a)That gives an audible and visual alarm before the tank fills to 97 percent of its capacity;
  2. (b)That can be seen and heard where cargo transfer is controlled and on the open deck;
  3. (c)Whose operation can be checked prior to each loading; and
  4. (d)That must be marked as described in § 153.408(c)(6) with the legend “HIGH LEVEL ALARM.”