Nobeltec WASSP Module Digital Download [WASSP]WASSP Module Digital Download The Unprecedented Commercial Fishing Solution The TZ WASSP Plus Pack allows you to integrate the cutting edge WASSP Sounder with TZ Professional for an unrivaled commercial fishing system. This sounder sends out beams in multiple directions so that it can detect 120 individual points at a time. Instead of just recording the depth of your boat's position like mono beam sounders, WASSP also registers the depth of the area