The vessel is certified by GL Classification Society. Welders who perform welding operation onboard this vessel shall be qualifed by GL or CCS, and obtain the certificates of corresponding levels and positions. Welders are required to work with certificates, and operate within the welding positions and methods prescribed by the certificates. Quality Controllers and Welding Technicians shall supervise and maintain the discipline of the working site, and to report any issues of welding operation in time.

sailing craft 中文意思

就是指“船、航船”

craft这里不是“工艺”的意思，而是“船艇”的意思。