Hull & Survey Terms(1).pdf

IACS

Recommendation 82

(July 2003)

Surveyor ’ s Glossary

Hull Terms & Hull Survey

Terms

SURVEYOR'S GLOSSARY

IACS

International Association of Classification Societies Limited 2003

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Rec. 82 / July 2003

1. Introduction

This Surveyor ’ s Glossary of Hull Terms is intended as a guide to improve the

standardization of survey reporting. It is recommended that the listed terms for

hull structural elements are used throughout report narratives.

The Glossary also includes definitions of common hull survey terms that are

applicable for surveys of hull structures and reporting.

All parties involved in the review of classification survey reports should have

this Glossary available to assist with correct interpretation of the report

narratives.

Rec. 82 / July 2003

2. Hull Terms

2.1 General

Accommodation Ladder is a portable set of steps on a ship ’ s side for people

boarding from small boats or from a pier.

Aft Peak Bulkhead is a term applied to the first main transverse watertight

bulkhead forward of the stern. The aft peak tank is the compartment in the

narrow part of the stern aft of this last watertight bulkhead.

Bay is the area between adjacent transverse frames or transverse bulkheads.

Bilge Keel is a piece of plate set perpendicular to a ship ’ s shell along her bilges

for about one third her length to reduce rolling.

Bilge Strake is the strake at the turn of bilge extending outward to a point where

the side rises vertically.

Breast Hook is a triangular plate bracket joining port and starboard side

structural members at the stem.

Bulkhead Deck is the uppermost continuous deck to which transverse watertight

bulkheads and shell are carried.

Bulkhead Structure is the transverse or longitudinal bulkhead plating with

stiffeners and girders.

Bulwark is the vertical plating immediately above the upper edge of the ship ’ s

side surrounding the exposed deck(s).

Cargo Area or Cargo Length Area is that part of the ship that contains cargo

holds and cargo / slop tanks and adjacent areas including ballast tanks, fuel

tanks, cofferdams, void spaces and also including deck areas throughout the

entire length and breadth of the part of the ship over the mentioned spaces.

Cargo Hold Bulkhead is a boundary bulkhead separating cargo holds.

Cargo Port is a door or port in a ship ’ s side for the loading or discharge of cargo

or stores. Also called side port.

Carlings are supports usually of flat plate, welded in a fore and aft direction

between transverse deck beams to prevent distortion of the plating.

Casing is the covering or bulkhead around or about any space for protection.

Rec. 82 / July 2003

Ceilings is wood sheathing or planking fitted on various parts of the ship such as

tank tops, ship ’ s sides and bulkheads to protect the ship ’ s structure from

damage and also used to protect the cargo from damage.

Coaming is the vertical boundary structure of a hatch or skylight.

Cofferdams are spaces between two bulkheads or decks primarily designed as

a safeguard against leakage of oil from one compartment to another.

Collision Bulkhead is the foremost main transverse watertight bulkhead.

Companion Way is a weathertight entrance leading from a ship ' s deck to spaces

below.

Confined Space is a space identified by one of the following characteristics:

limited openings for entry and exit, unfavorable natural ventilation or not

designed for continuous worker occupancy.

Cross Deck is the area between cargo hatches.

Cross Ties are used to support the longitudinal bulkheads of oil tankers against

hydrostatic and hydrodynamic loads.

Dead Covers are plates of bronze or steel working on a hinge serving to protect

the glass port light in heavy weather. Also called dead light.

Deck House is a structure on the freeboard or superstructure deck not extending

from side to side of the ship.

Deck Structure is the deck plating with stiffeners, girders and supporting pillars.

Deep Tank is a tank extending from the bottom or inner bottom up to or higher

than the lowest deck.

Discharges are any piping leading through the ship ' s sides for conveying bilge

water, circulating water, drains etc. Also called Overboard Discharge.

Double Bottom Structure is the shell plating with stiffeners below the top of the

inner bottom and other elements below and including the inner bottom plating.

Duct Keel is a keel built of plates in box form extending the length of the cargo

hold. It is used to house ballast and other piping leading forward which otherwise

would have to run through the cargo holds.

Enclosed Superstructure is the superstructure with bulkheads forward and/or

aft fitted with weather-tight doors and closing appliances.

Equipment Number is used by classification societies mainly to determine the

size and number of anchors and chain cables for a new ship.

Rec. 82 / July 2003

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