The White&rsquo;s Surfmaster P.I. Dual Field: &ldquo;an Advanced Guide&rdquo; Book by Clive Clynick In this detailed and informative guide to getting results with the whites surf master p. I. Dual field, Mr. Clynick shares his 30 years of shoreline pulse induction detecting experience Topics include: hearing gold "optimization." high-gain methods. Signal balancing for maximum depth Understanding p. I. Interference. Developing your accuracy through bench-testing. "Faint target awareness" p. I. Target selection Coil control tips and methods. Advanced site selection and analysis