CHAYKA

Chayka pulse

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.

Chayka-Chains

At the hill - RSDN-3/10, Crimea

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)	53°7′50.6″N 34°54′44.8″E			450
W/1	Petrozavodsk	61°45′32.4″N 33°41′40.4″E	13217.21	10000	700
X/2	Slonim (Belarus)	53°7′55.2″N 25°23′46″E	27125.00	25000	450
Y/3	Simferopol (Ukraine)	44°53′20.18″N 33°52′23.79″E	53070.25	50000	550
Z/4	Syzran	53°17′17.6″N 48°6′53.4″E	67941.60	65000	700

GRI 7950

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Alexandrovsk-Sakhalinsky	51°4′42.81″N 142°42′4.95″E			700
W/1	Petropavlovsk-Kamchatsky	53°7′48.26″N 157°41′49.1″E	14506.5	11000	700
X/2	Ussuriysk	44°31′58.24″N 131°38′28.6″E	33678.0	30000	700
Y/3	Tokachibuto (Japan)	42°44′37.2″N 143°43′10.5″E	49104.15	46000	600
Z/4	Okhotsk	59°25′1.77″N 143°5′18.68″E	64102.05	61000	10

GRI 5980

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Petropavlovsk-Kamchatsky	53°7′48.26″N 157°41′49.1″E			700
W/1	Attu Island (USA)	52°49′44″N 173°10′49.7″E	14506.5	11000	400
X/2	Alexandrovsk-Sakhalinsky	51°4′42.80″N 142°42′4.95″E	31506.5	28000	700

GRI 5960

Not in service any more

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Dudinka	69°21′45.20″N 86°41′50.56″E			1200
W/1	Taymylyr	72°34′48.92″N 122°06′40.29″E			1200
X/2	Pankratiev Island	76°7′34″N 60°12′55″E			250
Y/3	Inta	69°57′59.57″N 60°18′33.43″E			1200

GRI 4970

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Inta	69°57′59.57″N 60°18′33.43″E			1200
W/1	Tumanny	69°3′8.4″N 35°40′14.3″E
X/2	Pankratiev Island	76°7′34″N 60°12′55″E			250

GRI 5970

#	Place	Coordinates	Emission delay, μs	Coding delay, μs	Transmission power, kW
M	Yuzhno-Uralsk	54°23.1′N 61°20.6′E
W/1	Yekaterinburg	56°44.8′N 60°31.6′E	15895,1	15000
X/2	Kurgan	55°22.2′N 65°22.6′E	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