In existence since at least 1942 as the Naval Air Radio Installation Unit., (NARIU). In the 1957 FLIGHT magazine it states - based at RNAS Lee-on-Solent (HMS Daedalus) and undertook the design and construction of aircraft electronic installations for service trials, exercises and equipment evaluation. It also provided mobile air radio and radar workshops. Reported to Flag Officer Air (Home). It worked on a number of secret projects concealed under the heading of Trial installation of various H.F, V.H.F, radar, radio compass and navigational aid equipments in various aircraft and helicopters.; At some stage it was renamed Naval Air Trials Installation Unit (NATIU) at least by 1975. NATIU drew aircraft from the fleet as required, but did have a few based aircraft, for example Wessex HU.5 XS482 and XT757. 
My Grandfather William Frederick James Salter was on the NARIU/NATIU board for 22 years from 1952 HMS Siskin - HMS Daedalus 1974
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Models NATIU List of helicopters |
| C/N | Version | Built | In this Org | In other Org | |||
|---|---|---|---|---|---|---|---|
| 55-475 | HO4S-3 | 1953 | WV203 : Lee-on-Solent by Sep 1957; 728 Sq C Flt/623 by Feb 1968; NARIU by Sep 1958+ |  133743 - ZS-HDO | |||
| wa158 | hu.5 | 1963 | XS484 : pictured (pic1) at RNAS Lee-on-Solent (HMS Daedalus), operated by NATIU (T+ |  XS484 - XS484 | |||
| f.9580 | Wasp | 1964 | XS569 : dd Jul 1964 to RN. 703 Sq, NATIU, Wroughton to A2717, then A2639 G.I. Flee+ | ||||
| f.9585 | Wasp | 1964 | XT415 : RN d/d 23 Oct 1965; 700W Sq Aurora Flt/185, 829 Sq /455 by 1965; Paris Air+ |  XT415 | |||
| f.9599 | Wasp | 1965 | XT429 : RN, d/d 01 Jun 1965; Vidal Flt/408 by Jun 1968 until c Mar 1970; Bahrein S+ |  M499-08 | |||
| wa479 Scrapped | hu.5 | 1966 | XT757 : dd to Fleetlands store 21 Jul 1966, NATIU 1973-1974, 846Sq/XT by Mar 1975,+ | XT757 | |||
| wa485 w/o 1980 | hu.5 | 1966 | XT763 : Used Jan-Apr 1967 in a joint NARIU and 707Sq equipment trial, 845 Sq/T-B b+ | ||||
| f.9721 | Wasp | 1968 | XV626 : RN, d/d 18 Jun 1968; 829Sq Andromeda Flt/472-AM by Mar 1969 until c Oct 19+ | M499-06 | |||
| wa 665 | has.1 | 1970 | XV677 : HAS.1 820Sq /410-BL by Jan 1973, 814Sq /270-H by Mar 1974, NATIU trials a/+ | - XV677 | |||
| 010 | has.2 | 1977 | XZ233 : NATIU Lee on Solent uncoded 26Jan87; A & AEE uncoded 10Apr87; NATIU Lee on+ | - XZ233 | |||
| 019 | has.2 | 1977 | XZ237 : RN f/f 01Jul77 Westlands Yeovil; 28Jul77 (log book date) 08Aug77 official+ | - XZ237 | |||
| 094 | has.2 | 1978 | XZ254 : RN;HAS2 Type; First Flight 19Dec78; NASU Yeovilton 15Jan79; NATIU Lee on S+ | - XZ254 | |||
| 113 | has.2 | 1979 | XZ690 : 16Mar88 AMG RNAS Porland; 03May88 NATIU RNAS Lee-on-Solent; 16Jun88 702 Sq+ | - XZ690 | |||
| 128 | has.2 | 1979 | XZ694 : RN HAS.2; d/d 23Aug79 to NASU Yeovilton; 11Sep79 to NATIU Lee-on-Solent, + : 27Oct86 to NASU Yeovilton for GM Conversion, (the 3rd GM Conv); 02Apr87 to+ | - - | |||
| 186 w/o 2004 | has.2 | 1980 | XZ724 : 10Dec87 829 Squadron, HMS Boxer coded 376, named "Elwood"; 23Jun88 Westlan+ | ||||
| 200 w/o 1997 | has.2 | 1980 | XZ728 : 26Sept80 delivered to NASU Yeovilton as HAS.2;
30Mar81 to Westlands; 24Jul+ | ||||
| wa 899 | has.5 | 1982 | ZA166 : pictured (pic5) seen at RNAS Lee-on-Solent with 820 Squadron, operating wi+ | ZA166  ? | |||
| 299 | has.3 | 1983 | ZD263 : RN; 28Jul83 delivered to RNAY Wroughton for store;19Sep84 delivered to NAS+ | ||||
| 316 | has.3 | 1985 | ZD565 : RN, f/f 10Jan85 Westlands Yeovil; 28Jan85 delievered RN as HAS3 type to RN+ | ||||
