Today, we see cruise missiles as very accurate. This was not always the case. In fact, one cruise missile has the distinction of hitting the wrong continent – and it was quite a miss.
SM-62 Snark in flight. (USAF photo)
The missile in question was the SM-62 Snark. It was intended to help deter Soviet aggression. According to Designation-Systems.net, with a maximum range of 6,000 miles and a top speed of 550 knots, it had a W39 nuclear warhead with a 4 megaton yield – 20 times as powerful as the W80 used on the Tomahawk cruise missile and the AGM-86 Air Launched Cruise Missile.
It flew at 50,000 feet – which at the time made it hard to intercept with enemy anti-aircraft missiles.
The Snark needed the big warhead. The closest it came to hitting its target was within about eight miles. That is a very far cry from the 260 feet that Designation-Systems.net cited the early models of the Tomahawk cruise missile achieving.
SM-62 Snark missile on display in the Cold War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)
But Air Force magazine described the miss to end all misses. On Dec. 5, 1956, a Snark was launched with a flight plan to cruise to Puerto Rico and return to its base in Florida. Only, it stopped responding to signals.
Even a self-destruct command didn't work. The Air Force scrambled fighters to shoot down the wayward missile, but they couldn't pull off the intercept – proving that the design got that part right.
Ultimately, the missile went beyond tracking range – last seen headed towards Brazil. The missile would remain missing for 26 years until some wreckage was found in that South American country.
According to a Reuters report in the Regina Leader-Post, unidentified Brazilians found the parts and reported them.
SM-62 Snark launching from Patrick Air Force Base in Florida. (USAF photo)
Designation-Systems.net reported that the Snark would achieve a brief period of fully operational service from February to June 1961 (an initial operating capability was established in 1959). But then-President John F. Kennedy ordered the one active wing to stand down, largely due to the development of inter-continental ballistic missiles.