sight line spin

deployment line; line of deployment (LD); line of departure

spin rail

spin-stabilized

velocity of spin

recovery from spin

spin axis

spin-stabilized missile

spin

spin stabilization

change spin direction

Don't spin the motors when armed

Make sure your motors spin up reliably on arm and in the correct direction

Motors will spin when selected!

Motors will spin when setting the direction!

Resets all motor spin directions, then allows the user to choose which to reverse

The motors will spin up immediately when selected!

The motors will spin up!

Set motor spin direction by selecting and spinning each motor individually

Start / spin motors

turn / roll (over) / spin in one's grave

front sight (fore / muzzle sight)

sight, to take a (careful) sight

day-sight (day sight)

modular integrated display and sight helmet (Modular Integrated Display-And-Sight Helmet)

beyond line-of-sight (BLOS)

line of sight (missile)

non-line-of sight (NLOS)

align sight line

infrared sight-line control (ISC)

reciprocal sight line

sight line

sight line autopilot (SLAP)