High Speed Craft Code (IMO)

Health safety and environmental,Health and Safety Executive

Health & Safety Executive (UK)

Health, Safety and Environmental Group (U.K.)

Hull Stress Monitoring System

Health and Safety at Work Act

Home Trade limit Service.

Harmonized Tariff Schedule

Harmonized Tariff Schedule of the United States

Hague-Visby Rules

Heavy Weather

High Potential Test for Electric Equipment

Hertz

Interpretations and Insstructions.

International Association of Classification SocietiesGrouping of the main classification societies (about 10 in 1997) in order to raise the standards.

IADC International Association of Dredging (also Diving) Contractors

Inflation Adjustment Factor.

International Association of Institutes of Navigation

International Association of Lighthouse Authorities

International Association of Maritime Institutes