CHAYKA

Chayka (Russian: Чайка, lit. English: seagull) is a Russian terrestrial radio navigation system, similar to LORAN-C. It is also run on 100 kHz and is described like LORAN-C by its GRI.

Contents 1 Chayka-Chains 2 Chayka-Transmitters 2.1 GRI 8000 2.2 GRI 7950 2.3 GRI 5980 2.4 GRI 5960 2.5 GRI 4970 2.6 GRI 5970 3 See also 4 External links

Chayka-Chains

There are 5 Chayka-chains in use:

• GRI 8000 — Western (European) Russia Chayka Chain (1969, RSDN-3/10)
• GRI 7950 — Eastern Russia Chayka Chain (1986, RSDN-4)
• GRI 5980 — Russian-American Chayka Chain (1995)
• GRI 5960 — Northern Chayka Chain (1996, RSDN-5)
• GRI 4970 — North-Western Chayka Chain
• And also North-Caucasian, South-Ural (GRI 5970), Siberian, Angarsk, Sayansk, Transbaikalian, Far East chains deployed on the basis of low-power mobile stations RSDN-10.

Chayka-Transmitters

The following Chayka-transmitters work with very high power and may use as similar LORAN-C-transmitters very tall mast antennas. The masts at Dudinka and Taymylyr ( demolished in 2009) are 460 metres high!

GRI 8000

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Karachev (44 km from Bryansk)				450
W/1	Petrozavodsk		13217.21	10000	700
X/2	Slonim (Belarus)		27125.00	25000	450
Y/3	Simferopol (Ukraine)		53070.25	50000	550
Z/4	Syzran		67941.60	65000	700

GRI 7950

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Alexandrovsk-Sakhalinsky				700
W/1	Petropavlovsk-Kamchatsky		14506.5	11000	700
X/2	Ussuriysk		33678.0	30000	700
Y/3	Tokachibuto (Japan)		49104.15	46000	600
Z/4	Okhotsk		64102.05	61000	10

GRI 5980

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Petropavlovsk-Kamchatsky				700
W/1	Attu Island (USA)		14506.5	11000	400
X/2	Alexandrovsk-Sakhalinsky		31506.5	28000	700

GRI 5960

Not in service any more

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Dudinka				1200
W/1	Taymylyr				1200
X/2	Pankratiev Island				250
Y/3	Inta				1200

GRI 4970

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Inta				1200
W/1	Tumanny
X/2	Pankratiev Island				250

GRI 5970

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Yuzhno-Uralsk
W/1	Yekaterinburg		15895,1	15000
X/2	Kurgan		30939,5	30000

See also

• LORAN, the Western counterpart of Chayka
• Alpha, the Russian counterpart of the Omega Navigation System, still in use as of 2006.
• OMEGA, the Western counterpart of the Alpha Navigation System, no longer in use.
• Russian 460 metre radio mast

External links

• http://www.rirt.ru/onas/ist-e.htm Archive copy at the Wayback Machine