A screengrab from Yonhap News video (below) showing the fire on board the Panama-registered Auto Banner at the Port of Incheon, May 21, 2018. Credit: Yonhap News
The MV Maersk Honam on fire in the Arabian Sea, March 8, 2018. Photo: Indian Coast Guard
Cyclone-class patrol coastal USS Zephyr (PC 8) crew conducts ship-to-ship firefighting to extinguish a fire aboard a low-profile go-fast vessel suspected of smuggling in international waters of the Eastern Pacific Ocean April 7, 2018. Photo by Petty Officer 1st Class Mark Barney
A water cannon battle between Taiwanese and Japanese Coast Guard vessels.
Above we see some examples of water cannon in use by S. Korean, Indian, Taiwanese, and Japanese coast guard vessels and a Navy patrol craft supporting a Coast Guard mission, attempting to extinguish a fire. Looks like water cannon might be a handy thing to have.
On this original concept model of the Offshore Patrol Cutter there are four water cannon, two on the roof of the hangar and two on top of the superstructure between the Mast and the stack.
On later illustrations, the water cannon seem to have disappeared.
OPC “Placemat”
Am I missing something?
Chuck Hill's CG Blog 
Nothing on Size or How Many! But are to be Akron Brass Company Firefighting Monitors (Water Cannons)…
@Secundius, Good to know, thanks.
Akron has a range of manual and electric remote monitors. I would think that at least one on top of the hangar overlooking the flight deck would be provided.
On top top deck on CL just forward of the 3rd cutter boat appears to be a red fire monitor
Yes, I see what you are seeing. It’s most visible in the illustration (totally invisible on the photoshop image).
Nothing on size or how many… I hope they position them better than shown on these latest illustrations. The location on the centerline, amidships is VERY impractical/restrictive in terms of the water cannon’s arc and range.
But then again how Big and What Types of Water Pumps are being used to Force Water through these Red Fire Monitor “Beasts”. Determine That and it can be easily understood on why the Red Fire Monitors are being used…