Sometimes it is not necessary to read the CFR.
"The U.S. Coast Guard only monitors distress alert signals broadcast using digital 406 MHz emergency position indicating radio beacons as of 1 Feb. 2009. Satellite processing from all 121.5 or 243 MHz locators was discontinued. Digital 406 MHz models became the only ones approved for use in both commercial and recreational watercraft worldwide on 1 Jan. 2007, the Coast Guard said."
from 2182 kHz - Wikipedia, the free encyclopedia
I found other references that confirm my memory, 2182 was obsoleted as far back as 1998 in some parts of the world as the new global distress system came online and 406 epirbs became standard.
If you think CFR requires recreational sailors to carry and use 2182 equipment, which our own USCG no longer monitors (2009 was the end of a LONG grace period), good luck with that interpretation. The FCC seems to think there are no, none, zero, requirements for recreational boaters, aka yacht owners, to carry radios of any kind, either transmitters or receivers, anywhere on the planet. That's not commercial vessels, that's not compulsory service vessels, that's pleasure boaters
like 90%+ of this forum (and this topic) are. Not required to carry medium-wave (2182kHz) or VHF at all.
Page two within your linked URL of 47 CFR §§ 80.148, 80.310 also cites "68 FR 46967 August 7, 2003" and that may be the problem. This is an obsoleted reference to regulations that have since been changed. 2182 is dead, and there was quite a lot of protest about that--over a decade ago.