Word: detectable
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...striking an object near or far, returns an echo that is translated into a visual image on the radar screen. Radar can see the flight of a shell, the wake of a ship, the explosion of a target, the fall of a hit plane. At sea, it can detect buoys, reefs and other ships more than 20 miles away...
...what direction it is flying; fire-control radars which automatically aim and fire a machine gun or antiaircraft gun more accurately than a human gunner; special radars that provide eyes for night fighter pilots, guide planes to blind landings (called G.C.A., "Ground-Controlled Approach"), observe stratospheric weather balloons and detect storms. Engineers think that it may even be possible some day to develop a missile that will guide itself to a target by radar...
...they gave only a crude, distorted echo; 2) they had some blind spots, especially close to the ground; 3) they required huge "bedspring" antennae. Microwaves solved all these problems at one stroke. These tiny waves, which are measured in centimeters, can be formed into a beam precise enough to detect the periscope of a submerged submarine...
...pitch black, patched with fog and laced with rain which rattled like beans on the seamen's battle helmets. From the second ship in column, the lead ship Iowa was invisible. Japanese snooper planes appeared only as "blips" on the radar screen, then vanished, having failed to detect the fleet. The enemy coast was invisible to all but the magic eye of the gun directors. In another group, following, were British battleships such as the King George V, with ten 14-inch guns...
Future Strategy. For once, the admirals and ground commanders seemed more optimistic than the air generals. Even the airmen's General Henry H. ("Hap") Arnold, who yields to no man in all-around cheeriness, conceded that the Japs might last through 1946. Behind this unusual alignment, observers could detect a mild conflict in strategy: the admirals seemed to favor invasion of Japan at the earliest possible moment as the best way to get the war finished quickly; some airmen clung to the hope that air power, given enough time, could pound Japan into surrender...