As used in subsections (b), (c), (d), and (e) of this section and in section
183b of this Appendix, the term “seagoing vessel” shall not include pleasure yachts, tugs, towboats, towing vessels, tank vessels, fishing vessels or their tenders, self-propelled lighters, nondescript self-propelled vessels, canal boats, scows, car floats, barges, lighters, or nondescript non-self-propelled vessels, even though the same may be seagoing vessels within the meaning of such term as used in section
188 of this Appendix, as amended.