BG 23/BG 24
Back to Asrunners original question.
As Jim already pointed out, the ships BG 23 and BG 24 are German coast guard vessels. After a web search I think I can elaborate a little bit on this:
BG stands for "Bundesgrenzschutz" which is the German border police, a federal service. Their maritime arm, the "Bundesgrenzschutz - See" patrols the German waters mainly to clamp down on illegal immigration. Minor duties include general policing of the waterways, environmental and fishery protection as well as SAR. Their activities partially overlap with those of other federal and private services. In other parts of the world the Coast Guard takes care of all of these duties. To streamline the appearance of the German official services with that of other countries the German boats, regardless of whether they are under command of "Bundesgrenzschutz", "Fischereischutz" (fishery protection), or "Zoll" (customs service), now all sport the word "Küstenwache" (coast guard) on their hulls as well as US Coast Guard-inspired "racing stripes" in the national colors black, red, and yellow.
http://www.bgsamt-see.de/frame.htm (click on button "Seefahrzeuge" to see their vessels)
I have never seen the cfm kit for BG 23/24 in the flesh but the picture at cfm's website shows neither BG 23 nor BG 24 but BG 22 instead. All three boats BG 22 "Neustrelitz", BG 23 "Bad Düben", and BG 24 "Bad Bramstedt" are stationed in Neustadt (Holstein) on the Baltic Sea. Here some more pictures of the real ships:
http://www.seatowage.de/hafenliste/neustrelitz.jpg
http://www.seatowage.de/hafenliste/dueben.jpg
http://www.cuxhaven-fotos.de/jancux63/bg23.htm
http://www.ship-photo.de/modules/myalbum/photo.php?lid=523
http://www.seatowage.de/hafenliste/bad_bramstedt.jpg
Both BG 22 and BG 23 started their careers in the former German Democratic Republic as fast guided missile/artillery boats (project 151) of the "Volksmarine" (people's navy).
http://www.richardstokowski.de/ddr3.html
http://www.richardstokowski.de/vm2.jpg
After the collapse of the communist system and the reunification with the Federal Republic of Germany they were taken over by the Bundesgrenzschutz and remodeled to their present apparition called Type 50.
BG 24 "Bad Bramstedt" is a new construction (Type 66) and was designed for the Bundesgrenzschutz from the start. I wonder/doubt whether the kit actually lets you build BG 24/25/26.
Happy modeling
Bernhard