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HRP
HRP Headset-receptacle panel.
HRR 1 High-resolution radar.
2 High-range resolution; GMTI adds ground MTI.
HRS 1 Horizon-reference system.
2 High-resolution stereoscopic.
3 Hemispheric radar system.
hrs, Hrs Hours.
HRSAR High-resolution SAR(2).
HRSCMR High-resolution surface-composition mapping
radiometer.
HRSI High-temperature reusable surface, or silica,
insulation; Si-fibre tiles protected by fretted borosilicate
glass with pigment for desired absorption/emission ratio.
HRST Hyperspectral remote-sensing technology.
HRT High-resolution textured [simulator].
HRTS High-resolution telescope and spectrograph.
HRZ Helicopter restricted zone.
HRZN Horizon.
HS 1 Scheduled hours only.
2 Anti-submarine helicopter designation prefix (USN
1951–62).
3 Helicopter Squadron.
4 Hold short (command).
5 High speed [1553B bus].
Hs Maximum shoulder height of tyre [tire].
h s Total height of a stringer
HSA 1 Horizontal-stabilizer actuator.
2 Homeland Security Agency (US, 2002).
HSAB 1 Heavy-store[s] adapter beam.
2 NDB with automatic weather broadcasts.
HSAC Helicopter Safety Advisory Committee/Conference
[office, Houston, TX77205] (US).
HSACE HSA control electronics.
HSAD High-speed anti-radiation demonstration.
HSARD High-speed anti-radiation demonstration.
HSAS Homeland security advisory system.
HSCS High-specific creep-strength; M adds material[s].
HSCT High-speed commercial transport; usually
= M2.2-M5.
HSCU Horizontal-stabilizer control unit.
HSD 1 Hard surface, dry (runway).
2 Horizontal-situation display.
3 Homeland Security and Defense (US 2001), also
rendered as Homeland Security Department (2005).
HSDB High-speed data bus.
HSDC High-speed data channel; E adds extension.
HSE Health and Safety Executive (UK).
HSEC High-stability engine control.
HSF Half sampling frequency.
HSFD High-speed flight demonstration.
HSFRS High-Speed Flight Research Station (NACA
Muroc, became NASA Dryden).
HSF-RSAD High-speed [film] frame, relay service
access device.
HSI 1 Horizontal-situation indicator.
2 Hot-section inspection.
3 Hours since inspection.
4 Hyperspectral imagery, or imaging.
HSIN 1 Homeland Security Information Network
[2006–] (US).
2 High-speed impulsive noise.
HSIC High-speed integrated circuit.
HSIT Hardware/software integration test.
HSKT Hunter standoff-killer team.
HTCU
HSL Heading select.
HSLA High-strength low alloy steel.
HSLLADS High-speed low-level air-delivery system.
HSLV High-speed low-voltage (LSI).
HSM 1 Hard-structure munition, conventional munition
intended to have maximum effect on hardened
targets.
2 High-speed machining.
3 Hardware security module.
HSMF High-strength modified fluoropolymer.
HSMU Hydraulic system[s] monitoring unit.
HSN Hot-stream nozzle.
HSO Homeland Security Office (counter-terrorism,
UK).
HSOS Helicopter stabilized optical sight.
HSP 1 High-speed [1,300 m/s] penetrator, or penetration;
T adds technology.
2 Head-shrinkable polyolefin.
3 Hard spark[ing] plug.
HSR 1 High-speed research.
2 High-stability reference.
3 High sink-rate.
HSRP Hot-standby routing protocol.
HSS 1 Helicopter support ship.
2 Helicopter stabibilized sight.
3 Homeland security sensor, or suite.
4 Hypersonic sound.
HSSL Helicopter self-screening launcher.
HSSM High-speed [Mach 8] strike missile.
HSSS Helicopter secure-speech system.
HST 1 Hypersonic transport.
2 Heat-shrinkable thermoplastics.
3 High-speed tunnel, or turnoff.
HSTA Horizontal-stabilizer trim actuator.
HSTF High-strength toughened fluoropolymer.
HSU 1 Hartridge smoke unit.
2 High-speed unit (satcom).
HSV Highly supersonic vehicle.
HSVD Horizontal-situation video display.
HSW High-speed weapon[s].
HSWT High-speed wind tunnel.
HT 1 High turbine (US for HP turbine).
2 Hard time, thus * life.
3 Helicopter, training (USN category 1948–62, role
prefix, UK).
4 History tape.
5 Horizontal tail.
6 High tension [h.t. preferred].
H/T Hub-tip ratio.
ht Height.
h.t. High tension (electrical).
HTA 1 High-time aircraft of type.
2 Horizontal target attack.
3 Heavier than air.
4 Hand-entered terrain altitude.
5 Helicopter type allowance.
HTAD Hard-Target Attack Division (USAF).
HTADS Helmet target-acquisition and designation
system.
HTC 1 Hard-target capability.
2 See HTCU.
3 Human to computer.
4 Highest two-way channel.
HTCU 1 Hover trim control unit.
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