I knocked out a kit to help newcomers get a handle
on Manual Sonar.  The write-up has been on 'Tips and Tweaks.'

I have zipped the 5 elements as SVAC and it comprises:-

A. SVAC 1:-
>>>Progress Chart
>>>Sonar Procedure Scenario
>>>Part 1 Setting-up
>>>Part 2 Procedures

B. SVAC 2. -Photos

SUMMARY :-

TITLE:- Sonar Visual Aid Kit.

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.

Cheers,

"Bellman"