VSO
Vessel Security Officer (VSO) means a person onboard the vessel accountable to the Master and designated by the Company as responsible for security of the vessel, including implementation and maintenance of the Vessel's Security Plan, and for liaison with the Facility Security Officer and the vessel's Company Security Officer.
Source
46 CFR § 10.107
Scoping language
With respect to part 16 of this subchapter only, if the definitions in paragraph (b) of this section differ from those set forth in 16.105, the definition set forth in 16.105 applies.