I still remember the day one popped up, very unexpectedly. Among the calls I took that day at COSL was from the JCS, during which he told me we better be right. It was a sphincter moment but we prevailed. One of the more stressful days I can ever recall...
I'm not familiar with the TOPSY acronym, probably after my time at East Coast NAVFACs. The Pacific had a (different) acronym as well that I no longer remember. However, while searching for a clue that would remind me I stumbled upon this interesting web site. (See link).