Maritime Activity Reports, Inc. (Photo: Metal Shark) Shipbuilder Metal Shark has delivered two of three new welded-aluminum “50 Defiant” monohull pilothouse fireboats to Miami-Dade Fire Rescue (MDFR). Designed by Metal Shark’s in-house engineering team and built to Lloyds Registry Standard, the welded-aluminum monohull pilothouse fireboats “FB-21” and “FB-73” were acquired to boost MDFR’s maritime firefighting capability and will replace existing vessels in its fleet. Compared to MDFR’s outgoing vessels, the new 55’ x 17.5’ Metal Shark fireboats offer faster speeds enabling shorter response times, greater pumping volume increasing firefighting effectiveness, and a next-generation design improving efficiency while affording greater safety to the firefighters that staff the vessels 24/7.