Yes and no. COLREGS include U.S. Inland rules, and they apply on "navigable waters of the United States".
The OP is dreaming if he thinks he can get by with carrying firearms on a boat in Maryland waters. In both NY cases it seems pretty obvious to me that the USCG called the local yokels to arrest the captains.
WRT distress signals, a firearm is a permissible tool for sending distress signals, but that doesn't mean one is required. There are many other methods of signalling distress.
mariner, I agree that the CG called the local yokals.. VERY DISTURBING as I have been told by several Coasties that this is against their own policy. I will do my best to get a CITE for this.
I can also NOT find out what happened to the Captain that was obviously ratted out by tattletale coasties. knowing the State and the shenanigans they pull (new york) they swept it under the rug. Let the Capt go and dropped all charges.
I will go as far as to say having a GUN aboard is REQUIRED.
Here's the TEXT from which I base my decision.
When a vessel is in distress and requires assistance she shall use or exhibit the signals described in Annex IV to these Regulations
Notice the word SHALL
Then it goes on to say in Annex IV for International:
1. The following signals, used or exhibited either together or separately, indicate distress and need of assistance:
a gun or other explosive signal fired at intervals of about a minute;
a continuous sounding with any fog-signaling apparatus;
rockets or shells, throwing red stars fired one at a time at short intervals;
a signal made by radiotelegraphy or by any other signaling method consisting of the group
. . .- - -. . . (SOS) in the Morse Code;
a signal sent by radiotelephony consisting of the spoken word "Mayday";
the International Code Signal of distress indicated by N.C.;
a signal consisting of a square flag having above or below it a ball or anything resembling a ball;
flames on the vessel (as from a burning tar barrel, oil barrel, etc.);
a rocket parachute flare or a hand flare showing a red light;
a smoke signal giving off orange-colored smoke;
slowly and repeatedly raising and lowering arms outstretched to each side;
the radiotelegraph alarm signal;
the radiotelephone alarm signal;
signals transmitted by emergency position-indicating radio beacons;
approved signals transmitted by radiocommunication systems, including survival craft radar transponders.
Then it goes on to say in the Inland rules under the Authority of: 33 U.S.C. 2071; 49 CFR 1.46.
The following signals, used or exhibited either together or separately, indicate distress and need of assistance:
(a) A gun or other explosive signal fired at intervals of about a minute.
(b) A continuous sounding with any fog-signaling apparatus;
EtcEtcEtc
No my friend... having a Gun aboard is REQUIRED and not subject to the New Yorks, NJ's, MARYland etc etc. itty bitty capricious whims.