Please enter a keyword to search or click a letter below to browse the list of abbreviations and definitions through our glossary index.


Search Results for H
  • hour 
  • H AND M or H&M 
    Hull and Machinery 
  • H&M 
    Hull and machinery insurance 
  • H+M 
    Hull and machinery 
  • H-TYPE 
    Hakodate (vessel) type 
  • H.A. OR D. 
    Havre, Antwerp or Dunkirk 
  • H.S.A. 
    Hellenic Shipbrokers Association 
  • H/C 
    Held covered 
  • H/H 
  • H/V 
    Hague Visby Rules 
  • H2S 
    Hydrogen sulfide is the chemical compound with the formula H2S. It is a colorless, very poisonous, flammable gas with the characteristic foul odor of rotten eggs. 
  • HA 
  • Haematotoxic 
    Capable of causing injury to the blood and/or blood-forming tissues. 
    Hose Ancillary Equipment & Managing Hoses in the Field 
  • Hague Rules 
    A multilateral maritime treaty adopted in 1921 (at The Hague, Netherlands). Standardizes liability of an international carrier under the Ocean B/L. Establishes a legal “floor” for B/L. See COGSA 
  • Hallmarks 
    A mark indicating quality or excellence. 
  • Halon 
    Previously used on ships as an effective fire-extinguishing medium, harmful to the ozone layer in the atmosphere 
  • Hand over Fist 
    Hand over hand was a British term for the act of moving quickly up a rope or hoisting a sail, which was a matter of pride and competition among sailors. It is thought that American sailors changed this term to ‘hand over fist’, and the term now means to a
  • Handy 
    Vessel designed for carrying refined petroleum products in bulk tanks (19,001 dwt - 25,000 dwt approx ) 
  • Handy-sized vessel 
    A tankship suited to tie up at a T2 type pier. The mooring capacity of such berths restricts vessel length (LOA) to a maximum of 560-600 feet. In modern ship designs, this LOA allows a deadweight tonnage slightly exceeding 30,000. Such a tanker defines th
  • Handymax 
    Handymax or Supramax is a naval architecture term for a bulk carrier, typically between 35,000 and 60,000 metric tons deadweight (DWT). A handymax ship is typically 150–200 m (492–656 ft) in length, though certain bulk terminal restrictions, such as those
  • Handymax Vessel 
    A dry bulk vessel of 35,000 to 49,000dwt. (Note that a “Handy” drybulk carrier is from 10,000 to 34,000dwt.) A “Handymax Tanker” is a liquid bulk carrier of 10,000 to 60,000dwt. 
  • Handysize 
    Usually refers to a dry bulk vessel with deadweight of about 15,000–35,000 tons. The most common industry-standard specification handysize bulker is now about 32,000 metric tons of deadweight on a summer draft of about 10 metres (33 ft), and features 5 ca
  • Handysize Tanker 
    A product tanker that ranges in size between 27,000 and 39,999 deadweight tonnes. 
  • Harbor 
    A harbor is a sheltered part of a body of water deep enough to provide anchorage for ships or a place of refuge. Key features of all harbors include shelter from both long-and short period open ocean waves, easy safe access to the ocean in all types of we
  • Harbor and Ship Assist Tugs 
    Tugboats are designed to be powerful enough to push and pull objects many times their size. Harbor tugs are essential in every port to help maneuver large ships through narrow harbors and to assist them in docking and undocking from confined spaces. Harbo
  • Harbor Master 
    An official responsible for construction, maintenance, operation, regulation, enforcement, administra- tion and management pertaining to marinas, ports and harbors. 
  • Hard and Fast 
    A ship that was hard and fast was simply one that was firmly beached on land. Has come to mean ‘rigidly adhered to – without doubt or debate’. 
  • Hard Butter 
    A generic term used primarily in the confectionery industry to describe a class of fats with physical characteristics similar to those of cocoa butter or dairy butter. 
  • Hard Up 
    Hard is another often used nautical term. To put the helm hard over is to put it as far as it will go in that direction. Hard and fast describes a vessel firmly aground and unable to make progress and has come ashore to mean rigid. ‘Hard up in a clinch an
  • Harmonized System of Codes (HS) 
    An international goods classification system for describing cargo in international trade under a single commodity–coding scheme. Developed under the auspices of the Customs Cooperations Council (CCC), an international Customs organization in Brussels, thi
  • HAT 
    Highest astronomical tide 
  • Hatch 
    The opening in the deck of a vessel; gives access to the cargo hold. 
  • HAZ MAT 
    Hazardous Material 
  • Hazard 
    The hazard associated with a chemical is its intrinsic ability to cause an adverse effect. It should be compared to risk, which is the chance that such effects will occur. Whilst a chemical may have hazardous properties, provided it is handled safely unde
  • Hazardous Chemical 
    Any chemical that is a physical (i.e. -flammable, reactive) or health (i.e. irritant, carcinogen) hazard 
  • HBF 
    Harmless Bulk Fertilizer 
  • HBI 
    Hot Briquetted Iron 
  • HBL 
    Hydrostatic Balanced Loading (Marpol 13g): A process that may be adopted by single hull tankers if they wish to trade beyond 25 years of age through to final "phase-out" date at 30 years of age. This method of operation is designed to reduce the environ 
  • HBR 
    Hamburg range 
  • HC or H/C 
    Hatch cover; Hold cleaning 
  • HCFC 
    Hydro-chlorofluorocarbon compounds, such as freon 22 (R22) 
    Head charterers 
  • HCl 
    Hydrochloric Acid 
  • HCM 
    Ho Chi Minh City 
  • HD 
    Half DIspatch or Per hatch per day 
  • HDATS 
    Half dispatch all time saved 
    Half dispatch all time saved both ends 
  • HDL 
    Hatch delivery 
    Half Dispatch Lay Time Saved Both Ends 
  • HDPE 
    High-density polyethylene. A plastic that is used predominantly in the manufacture of blow-molded bottles for milk and household cleaners and injection-molded pails, bottle caps, appliance housings, and toys. 
  • HDWTS 
    Half Despatch Working Time Saved 
    Half dispatch working time saved both ends 
    Half despatch working time saved both ends 
  • Health Hazard 
    A chemical for which there is statistically significant evidence that acute or chronic health effects may occur in exposed employees 
  • Heart cut 
    A distillation fraction restricted to a narrow range to meet specific needs. The navy, for instance, buys a heart cut of ordinary jet kero known as JP-5. 
  • Heat Bleaching 
    The process by which the natural carotene which colours crude palm oil is destroyed in the final stage of refining during deodorisation at temperatures above 240°C. Sometimes called "thermal bleaching". 
  • Heaving 
    Ship Stability: is the linear vertical (up/down) motion 
  • Heavy condensates 
  • Heavy Crude 
    Crude oil that is more difficult to pump and process due to a higher viscosity. 
  • Heavy fuel oil 
    A dense, opaque petroleum derivative made from the unboiled material, the bottoms or residue, from crude vacuum distillation units plus, perhaps heavy product from crackers. Blends made to meet market or specific customers standards often also include qua
  • Heavy Grade Oil 
    Heavy grade Oil: o crude oils, having a density at 15º C higher than 900 kg/m3; o oils, other than crude oils, having either a density at 15º C higher than 900 kg/m3 or a kinematic viscosity at 50 º C higher than 180 mm2/s; or; o bitumen, tar and their e