// ORBITAL LOGISTICS AND PROPULSION TERM
Hold
A "hold" is a planned or unplanned pause in a countdown or an operation, usually to resolve a technical issue or wait for better conditions. It stops the clock until the problem is fixed.
TECHNICAL DEFINITION
A hold is a deliberate or emergency suspension of a countdown or operational sequence, typically initiated to address technical anomalies, unfavorable environmental conditions, or to await a specific event, ensuring safety and mission success before proceeding.
BACKGROUND
An aerospace manufacturer is a company or individual involved in the various aspects of designing, building, testing, selling, and maintaining aircraft, aircraft parts, missiles, rockets, or spacecraft. Aerospace is a high technology industry.
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- Pause
- Standby
- Delay
- Stop
USAGE NOTE
The launch director called a hold at T-minus 5 minutes due to an unexpected sensor reading.
DEVELOPERS
Organizations developing technology related to Hold.
Manufactures the Cygnus cargo spacecraft which features a pressurized module to hold and transport supplies to the ISS. Its subsidiary, SpaceLogistics, also operates the Mission Extension Vehicle (MEV) that physically docks with and holds onto client satellites to provide life-extending services.
Designs and operates the Dragon spacecraft, which features a pressurized capsule and unpressurized trunk to hold cargo. The company also engineers the complex hold-down clamps and release systems that secure its Falcon rockets to the launch pad prior to liftoff.
A leader in space robotics, developing systems like the Canadarm series and the SPIDER robotic arm. These systems are designed to grapple, hold, and manipulate spacecraft, payloads, and components for on-orbit servicing, assembly, and repair.
Developing the Dream Chaser spaceplane, a reusable vehicle with an integrated cargo module designed to hold and transport pressurized and unpressurized payloads to and from low Earth orbit.
Engineers robust hold-down and release mechanisms for its Vulcan Centaur launch system. ULA is also advancing cryogenic fluid management to efficiently hold and store liquid propellants in space for long-duration missions with minimal boil-off.
A primary manufacturer of pressurized modules for space stations, such as the modules for the ISS, Axiom Station, and the Cygnus cargo vehicle. These modules are engineered to hold crew, experiments, and a life-sustaining atmosphere.
A technology company specializing in developing in-space cryogenic propellant depots. Their core mission is creating efficient, long-term storage solutions to hold volatile propellants like liquid oxygen and liquid hydrogen in orbit.
A Japanese robotics startup developing dexterous robotic arms for space applications. Their robots are designed to hold and operate tools, manipulate components, and perform complex assembly and maintenance tasks in space.