The first US weapon utilizing laydown delivery was the Mark 15 bomb, and was the first "light weight" thermonuclear bomb.
The Mark 7 bomb was delivered using the loft bombing, a similar technique to laydown, but laydown delivery and lob delivery are not one-and-the-same for various reasons including the use of a retarding parachute on the bomb during laydown, and the attitude of the aircraft when the weapon is released.
Air Burst
The deadly effects of an atomic, or nuclear weapon include heat, radiation and blast. All three of these effects will propagate over a greater surface area if detonated some distance in the air over the target. Assuming the target population is concentrated at or near the surface, such as a city or most military bases, an air burst would be most deadly. If the target is underground in a hardened bunker, then a surface or even subsurface detonation would be more effective.
air burstAir Burst
Airburst and altitude, Surface burst, Subsurface burst and depth (dirt, rock, or water)? Different in each case.
air burst
Surface burst, but any nuclear weapon can be capable of doing that.
High-altitude burst
High-altitude Burst
Surface Burst
A zero point is the location of the centre of the burst of a nuclear weapon at the instant of detonation.
Air Burst
The deadly effects of an atomic, or nuclear weapon include heat, radiation and blast. All three of these effects will propagate over a greater surface area if detonated some distance in the air over the target. Assuming the target population is concentrated at or near the surface, such as a city or most military bases, an air burst would be most deadly. If the target is underground in a hardened bunker, then a surface or even subsurface detonation would be more effective.
air burstAir Burst
surface burst
sub surface burst
Surface burst
sub-surface burst