Bell flight 5. Pilot noted low-frequency elevator buzz at mach 0.93, did not proceed above this speed, pending buzz investigation.

Council of Soviet Ministers (SM) Decree 'On approval of work on the R-5M missile and on establishment of OKB-586 at Dnepropetrovsk Plant No. 586' was issued. Sadoviy and Kozlov were named to lead the project. Based substantially on the R-5, it used the 8U25 launch portable launch stand.

Escape-motor canting-angle tests were completed at Wallops Island. Tests were conducted in 5 degree increments between 10 degrees to 30 degrees, and visually it appeared stability was better at the larger angle.

North American awarded a $9.5 million letter contract to the Link Division of General Precision, Inc., for the development and installation of two spacecraft simulators, one at MSC and the other at the Launch Operations Center. Except for weightlessness, the trainers would simulate the entire lunar mission, including sound and lighting effects.

The upper stages fell apart on re-entry into the atmosphere..

Leonov announces that cosmonauts are in training for lunar missions.

No cosmonauts will be sent to witness the next series of unmanned Soyuz flights beginning on 14 April. All cosmonaut staff efforts are concentrated on the Gagarin crash investigation. Kamanin notes the flight of Apollo 6. According to his information the first manned Apollo flight will take place in May-October 1968, and the first American moon landing by the end of 1969.

Kamanin previews the documentary film 'Launch after Launch' on the Soyuz 6-7-8 missions.

-6 deg C at Baiknur, 5 m/s wind. A party of the 'old comrades' is held in Leninsk to commemorate the tenth anniversary of Gagarin's launch.

Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

KH-9 type satellite. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

Radar monitoring.

Ferry flight, shuttle carrier aircraft/Enterprise (OV-101) from MSFC to KSC (1 hour, 52 minutes)

The decision was taken not to convert the Enterprise to a flight orbiter due to the numerous structural design changes made since its construction. Static test article OV-099 would be used for that instead. So Enterprise became a pathfinder vehicle at Cape Canaveral to verify fit and handling of ground facilities in the Vertical Assembly Building and LC39.

Manned two crew. Flight under the Intercosmos programme of an international team consisting of N N Rukavishnikov (USSR) and G I Ivanov (Bulgaria). Unsuccessful mission. Failed to rendezvous with Salyut 6.

Also carried transponders for domestic communications. Operational multipurpose satellite for telecommunications, meteorological, imaging and data relay, radio and television programme distribution and direct television broadcasting for community reception. Geosynchronous orbit longitude 74 E. A/AC.105/INF.391 was reissued as ST/SG/SER.E/79. Also registered by the United States as 1982-31A in ST/SG/SER.E/67, with category C and orbital parameters 1416.7 min, 35032 x 35783 km x 0.5 deg. Positioned in geosynchronous orbit at 73 deg E in 1982 As of 29 August 2001 located at 82.99 deg E drifting at 0.337 deg W per day. As of 2007 Mar 10 located at 39.55E drifting at 0.205W degrees per day.

High resolution photo reconnaissance; returned film in two small SpK capsules during the mission and with the main capsule at completion of the mission.

Global Positioning System. Retired 15 August 1997.

Successful. Earth impacted at 4054 seconds. Reached 66.7 km.