<p>➀ A trawler caught 7 1/2 times as much fish as with conventional driftnet methods using new electronic fish-finding equipment developed by Kelvin and Hughes (Marine) limited; </p><p>➁ The story dates back to 65 years ago, when CERES (Combined Echo Ranging Echo Sounding) equipment was introduced; </p><p>➂ CERES combined echo-ranging and echo-sounding to improve fishing efficiency.</p>