The paper describes internal gravity waveguide modes. using dissipative solutions above the source. We compare such a description with an accurate approach and a WKB approximation for dissipationless equations. For waveguide disturbances. https://www.diegojavierfares.com/limited-save-1-64-Lowndes-2010-Triple-Eight-Race-Engineering-Suits-Holden-VE-Commodore-64168-special-save/