Code of Federal Regulations Title 46. Shipping § 46.153.409 High level alarms

(a) That gives an audible and visual alarm before the tank fills to 97 percent of its capacity;

(b) That can be seen and heard where cargo transfer is controlled and on the open deck;

(c) Whose operation can be checked prior to each loading;  and

(d) That must be marked as described in § 153.408(c) (6) with the legend “HIGH LEVEL ALARM.”