Sailor: Health certificate, which is divided into one-year health certificate and two-year health certificate. Vaccination certificate, generally cholera, yellow fever. Seaman's certificate. The basic safety training certificate generally includes four basic safety and one safety awareness. Sailor card, ordinary sailor card (generally two or one water), advanced sailor card (generally one water). Crew service manual. Passport. Moreover, the certificate of the area where the flag country is located is generally handled by the shipping company.