Profile: Macha International, Inc. designs and manufactures seismic source control instrumentation and test equipment. We manufacture distributed source control systems for land and marine operations. Our quality control instruments include geophone and cable testing equipment. Our products include break locator, cap resistance galvanometer, portable cable tester, cable test fixture, portable telemetry cable tester, and line communication. Our break locator pinpoints breaks in any unshielded cable including geophone strings and multi-pair seismic cables. The CRG-200 is a rugged, waterproof, compact unit designed to test single and multiple blasting cap circuits. The watertight package is virtually indestructible, and the CRG-200 floats.