[Bill Nichols]

'Bellman' has sent me his Sonar Visual Aid Kit. It's posted now at my site in the 'Downloads' section.

Description :- Instructions and photos for making a simple and
effective pinboard to assist in learning manual sonar.
A practise Scenario and run through of the system.
A Progress Chart for logging contacts and frequencies, classifying,
and filtering targets.

Thanks, Bellman!