Tranquility base May 1984 documentation file by the Disk Jockey. NOTE: THIS IS NOT THE SAME TRANQUILITY BASE WRITTEN IN 1979 BY BILL BUDGE. LEM controled by I-J-K-M controls. 0, 2, P, N controls engine thrust. P - postive increase thrust N - negative decrease thrust O - lets thrust be increased or decreased in increments of 10%. 2 - lets thrust be increased or decreased in increments of 2% R - refuels the LEM if it is within 500M of the center of the TB base and engine not running E - starts engine at 10% thrust. If engine running, stops engine. Q - returns you, at any time to the LEM cockpit. G - begins with the LEM on the launching pad. A - begins with the LEM approaching TB. O - starts the LEM in lunar orbit. A joystick can be used to control PTCH and ROLL: pitch down ^ roll left <- ! -> roll right v pitch up ALT=altitute in meter or kilometers DIST=distance to target in meters/kilometers. XRNG=cross track distance in meters or kilometers. + to the right, - to the left. VELZ=vertical speed in meters/sec. VELY=forward or (-) backward speed in meters/sec. PTCH=controls the angle of the ship along the forward/bac axis. ROLL=controls the attitude of the ship along the left/right axis. ENG=engine thrust in % from 0 to 100. FUEL=the percentage amount of remaining fuel. TIME=the elapsed time the engine has been running in minutes. TB portrays space flight and lunar landings with true-to-life accuracy. The laws of motion and gravitation affect the LEM spacecraft much like they influence an actual spacecraft in outer space. Using the Joystick or Keyboard, you can increase or decrease engine thrust, change the pitch -90 to +90 degrees, and roll from -10 to +10 degrees, refuel your spacecraft and start the engines. Established on July 4, 2026, TB remains the only US permanent colony on the moon. It is inhabited year-round by an average population of 56. TB remains a research oriented facility with the majority of the residents involved in pure-science studies. The base itself consists of 4 interconnected geodesic domes called Atlanta, Boston, Chicago, Detroit (yeh!) and covers a total area of almost one acre (note cities are labeled A, B, C, D). The launch pad is located 3000 meters to the west. A rover connect the base with the launch pad. Boston houses one of the basic 2 computer center as well as the hydroponic farm and assorted labs. The infirmary is also located in this Dome. Chicago is the center for top secret research authorized by the defense department. Detroit is the center for advanced manufacturing. Scientists from a number of major computer chip makers have joined forces to develop a new substance for UMSI (ultra micro scale integrated) chips. MISSION PROFILE: As a recent grad of the US Space Academy, you have been sent to TB for further flight training in the advanced LEM (lunar excurision module). The training involves seven different exercises: 1. Soft landing: take the LEM to 6000 meters above lunar surface and bring it back to a soft landing an TB. 2. Hovering: practice the technique of stopping the ascent or descent of the LEM and hover. 3. maneuvering during Hover: use the pitch and roll controls to practice moving the spacecraft forward, back and lateral while hovering. 4. Landing from Approach: take control of the LEM between 10 and 20 kilometers from the base. Using only the pitch and thrust controls, you must reduce the speed of the spacecraft and land it safely anywhere on the lunar surface. A gentle landing is most important. 5. Landing at base from approach: take control of the spacecraft on approach and must land it safely within 500 meters of the center of the TB landing pad. 6. Descent to base from orbit: pilot LEM as it orbits the moon at an altitude greater than 50 kilometers and bring it to a safe landing within the perimeter of the TB landing pad. 7. Liftoff: start at TB landing pad and pilot the LEM into lunar orbit. SOFT LANDING: Control the thrust as you take the LEM to an altitude of 6000 meters and then descend for a safe landing at the base. Press G to start. Use R to refuel for your training flight. To set coarse thrust adjustments press 0. Press E to start the engines. Press P and increase the trust to 60%. Then press 2 to set fine adjustments. VELZ and ALT increase as you gain speed and altitude. Reduce the thrust until VELZ stops increasing. The LEM should be climbing at a constant rate. Try to keep VELZ at 20 M/S. When ALT reads 6000M, press E to stop the engines. Press it again to restart engines at 10% thrust. HOVERING: Pilot LEM to 6000M and then slowly return to the lunar surface, hovering at 30M above the landing site. Press G to start, and press R to refuel. Now press E to start engines and increase thrust to 60%. Reduce thrust to maintain VELZ of 20 M/S. At an ALT of 6000M, press E to stop the engines. Now press E to restart the engines and quickly increase the thrust to a rate of 6 to 8% below the balance thrust level. Let VELZ decrease to -30M/S and use your fine thrust adjustment to maintain this rate of descent. As the LEM falls back towards the surface of the moon, slowly increase your thrust so that when you reach an ALT of 100M, your VELZ will show -1 M/S. As you approach an ALT of 30M, increase thrust slightly, an then reduce it back to the balance thrust level. The LEM should now be hovering a few meters above the base. To maintain this, use the fine thrust adjustment. Bring LEM in for a soft landing, reduce thrust slightly and wait until VELZ is -2M/S. Return the thrust to its previous balance thrust. Remember, a VELZ of -4M/S or greater will result in a crash, so keep the VELZ at -3 M/S. LIFTOFF: First refuel the LEM, then start the engines and increase the thrust to 100%. quickly move PTCH to -60 degrees. To achieve escape velocity, VELY must be over 1600 M/S and VELZ should be 0 M/S. Use PTCH controls to stop any increase in VELZ. As you approach escape velocity, gradually increase PTCH to -90 DEG. When VELY exceeds 1600 M/S, stop the engine. If the LEM begins to descend, restart the engine and increase thrust until the orbital speed increases enough to stop the decent. Hope this helps with the game! -THE DISK JOCKEY-