46 C.F.R. § 90.10-42 Tankerman.
Title 46 - Shipping
The following ratings are established in part 13 of this chapter. The terms for the ratings identify persons holding valid merchant mariners' documents for service in the ratings issued under that part: (a) Tankerman-PIC. (b) Tankerman-PIC (Barge). (c) Restricted Tankerman-PIC. (d) Restricted Tankerman-PIC (Barge) (e) Tankerman-Assistant. (f) Tankerman-Engineer. [CGD 79–116, 60 FR 17157, Apr. 4, 1995]
Title 46: Shipping
PART 90—GENERAL PROVISIONS
Subpart 90.10—Definition of Terms Used in This Subchapter
§ 90.10-42 Tankerman.