I have been in active email exchanges with individuals in Argentina, German, the UK and in various US states about the loss of the ARA SAN JUAN.

Often these exchanges have expanded into ancillary subjects that involve acoustics and excellent (penetrating) questions which I have been able to address by referring the questioner to my articles posted on the IUSSCAA site.

That is most convenient and I again express my appreciation for site management for archiving that material which - with the final addition of five postings - will total 122. Who would have "thunk" it back in 2012.