Witnesses to the recent Black Cat cruise boat accident after it grounded just outside the Akaroa Heads are urged to submit a statement to TAIC immediately.
A manoeuvring speed indication on an engine telegraph that results in a set amount of engine revolutions, which in turn will give rise to a certain speed for the vessel
Half-arm barriers
Physical barriers at a level crossing that are automatically lowered a short period after flashing lights and bells have been activated. Vehicles on the level crossing can exit the level crossing control area because the barriers obstruct only half the carriageway.
Handle off position
There are distinct zones for a train’s brake, known as quadrants. These are: Release; Minimum reduction; Service zone – during normal operation where the reduction is at service rate [controlled rate]; ‘Handle off’ position – for conditioning the brake valve where the brake is applied at service rate. Emergency application – where a brake pipe vents to the atmosphere and brakes are applied more rapidly than a service rate through the train. The Emergency position provides all the available brake effort in a shorter time, together with sanding at the wheel/rail interface to reduce the stopping distance.
Handy bulk carrier
Handy bulk carriers are approximately 10,000 to 39,999 deadweight tons
Hard landing
Sometimes referred to as a heavy landing, when a landing exceeds the manufacturer’s limitations, often expressed as a rate of descent or a ‘g’ loading. This may result in a loss of control and/or aircraft damage and will require an inspection.
Hard to starboard
Maximum starboard rudder angle
Hatch cleats
Steel locking devices for securing a hatch lid
Hatch coaming
Vertical structure around a hatch, or other opening in the deck, to prevent water ingress.
Hauling in the net
Retrieving the net after fishing
Hawse pipe
A pipe in which the anchor shank is housed and through which the anchor cable passes when the anchor is used. The hawse pipe runs through the forecastle from beneath the anchor windlass to the outside of the hull.
Head wagon
The first wagon at the locomotive end of the rake.
Head-on situation
Such a situation will be considered to exist when a vessel sees another ahead or nearly ahead and by night, the masthead lights of the other vessel are in line or nearly in line and/or both sidelights are visible (Maritime Rules Part 22.14.2(a))
Heading (marine)
The compass direction in which a vessel’s bow is pointing.
Headlines
Mooring lines leading ashore from the fore end of a ship in a forward direction
Headway
Time or distance interval between trains on the same line
Heat-sensitive wheel paint
Paint applied to wheel plates, normally a light grey that turns to dark grey or brown when exposed to excessive temperatures (typically around 250–300ºC). Used in maintenance to identify wheels that have been subject to overheat conditions.
Heaving
Lifting or to hauling
Heaving Line
Light line thrown to pass a heavier mooring line
Heavy destress unit
Destressing is the process of adjusting the rails to a stress-free state at a certain rail temperature. Destressing helps the rails cope better with temperature extremes and prevents buckling or contraction.
Heavy rain
Heavy or very heavy rates of rainfall will clearly have a detrimental impact upon general visibility. However, in addition to any true meteorological reduction of visibility, raindrops impacting the windscreen/canopy will additionally reduce visibility. Windscreen wipers (if fitted) may not be able to fully cope with the rainfall rate. (World Meteorological Organization, n.d.)
Heavy rainfall
Greater than 100 millimetres of rainfall over a 24-hour period or a period of rainfall between 10 and 50 millimetres per hour as classified by the National Institute of Water and Atmospheric Research, Taihoro Nukurangi (NIWA).
HEB
HEB Construction Limited
Heli winch
A helicopter operation involving the use of a hoist mechanism with cable and hook that allows a lowering and/or pick up of an external load/cargo/person from the side of the helicopter.
Helicopter frost protection
Helicopter frost protection involves low-level flying over an affected crop to mix warmer air aloft with the cooler air below to prevent frost from settling on the fruit.
Heliport
Any defined area of land or water, and any defined area on a structure, intended or designed to be used either wholly or partly for the landing, departure and surface movement of helicopters
Helm
The means, such as a steering wheel, by which a vessel’s steering is controlled.
HEMS
Helicopter emergency medical service
HH
Waikato Hospital
Hi-rail excavator
A road vehicle fitted with retractable rail wheels, which can be driven along rail tracks and on/off tracks at level crossings and other suitable places.
Hi-rail vehicle
A vehicle fitted with equipment that gives the capability to travel on both road and rail.
Higgins
Higgins Contractors Limited
High and dry
Grounded and entirely above the water at low water.
High risk vessel
A ship that has attracted a high number of deficiencies through successive PSC inspections.
High-expansion foam
A type of foam used for fire suppression.
High-reliability organisations
High-reliability organisations are those that operate in highly hazardous environments with high safety performance, eg, air traffic management systems, commercial aviation, and nuclear power stations.
HMNZS
Her/His Majesty’s New Zealand Ship
HMU
Hydro-mechanical unit
HN
Hamilton Airport
HNVGO
Helicopter night vision goggle operations
Hobbs meter
An activated hour meter used to track the helicopter’s time in service.
Hold Baggage
Checked luggage carried in an aircraft hold
Home base
Where pilots would commence and conclude their rosters.
Home signal
A signal that controls the entry to a station or junction.
Hook and loop retaining strap
The term ‘hook and loop retaining strap’ is commonly used internationally in manuals. An alternative term, ‘hook and loop style fastener’ is often used in safety information bulletins.
Hopper
Part of an agricultural aircraft used to store chemicals to be spread.
HoT
Head of training
Hot air baloon
Incorporates the complete balloon assembly, including the basket, burners and envelope.
Hot stretch
A condition that occurs when a light, comprising a coiled filament suspended between two contact posts, is subject to a sudden strong shock loading while illuminated. The hot ductile filament will stretch before breaking. A light that is not illuminated will act in a brittle manner and break without stretching. This is not an exact science as it can vary with the strength and direction of the shock loading. Also, if an accident sequence is protracted, an illuminated filament may have sufficient time to cool and act in a brittle manner.
Hot work
Work requiring the use of welding, burning or soldering equipment, blowtorches and tools that generate sparks.
Hourly rainfall rate
A rolling average hourly rate
hp
Horse power (a unit of power, 1 kW = 1.341 hp)
hPa
hectopascal
HSWA
Health and Safety at Work Act 2015
HSWA-GRWM
Health and Safety at Work Act 2015 – General risk and workplace management regulations
HUET
Helicopter underwater escape training
Hull loss
The destruction or write-off an aircraft
Human factors
The science of human behaviour and its influence on the occurrence of human errors
Hydrostatic pressure test
A test for determining the strength and leak-resistance of pressure vessels
Hydrostatic release
A pressure-activated mechanism designed to automatically deploy a life raft when certain conditions are met.
Hydrovac truck
A vacuum excavator truck purpose-built for non-destructive digging and locating underground service.
