Custom bracket and mount fabrication in Busan port

Jobs that overrun in port rarely overrun because of the electronics. They overrun because the new unit does not fit what is already welded to the vessel. The replacement transducer has a different bolt pattern from the tank it must sit in; the display is thirty millimetres wider than a console cut-out made twenty years ago. Waiting for a mount to be shipped in is not an option inside a port call, so we measure on board and make it here.

Transducer fairings and blisters are the most common item. On a hull with deadrise a flat-mounted transducer looks sideways, and the picture degrades with every degree of tilt, so the fairing is shaped to bring the face back to horizontal at working trim. The leading edge is faired so flow stays attached and the face does not aerate at speed. We set the offset from the hull form, keep clearance inside for the stuffing tube, and check the beam is clear of keel coolers and sea chests. Welding to structure is done under the vessel's hot work permit and with the yard; anything that opens the hull envelope belongs in dry dock.

Sensor cages for trawl gear are the second. Marport and similar sensors survive the water; what kills them is the door striking the bottom, wire abrasion and the drag over the stern ramp. A cage puts that load into the gear instead of the sensor body. Bars are spaced clear of the transducer face and the release path, edges are rounded so netting does not snag, and mounting is by shackle or clamp so the crew can change a sensor at sea in minutes.

Antenna brackets on masts have their own constraints. A GNSS or satcom antenna needs a clear sky view and separation from the radar beam and from HF and VHF radiators, and the bracket must put it there without turning the standoff arm into a tuning fork. We size wall thickness and gussets for the moment arm, allow for icing and green water, and keep the mounting face flat so the pedestal does not bolt down stressed. Where aluminium meets steel, isolating bushes, washers and sealant go in as standard.

Inside the wheelhouse the work is adapter plates and console mounts. When a new display is a different size from the one it replaces, we make a plate that closes the old cut-out cleanly, keeps the bezel line straight and holds the ventilation gap the unit needs behind it. Swing arms and gimbal cradles get built where the screen has to move for a sightline or watch position. Behind the panel, backing plates and DIN rail carriers hold processors, power supplies and switches on structure, not on their own wiring.

Material follows the location: 316 stainless or hot-dip galvanized steel outside, marine grade aluminium on masts, mild steel where it is welded to a steel hull so coatings and anodes still work as designed. Welds are dressed, edges radiused, holes deburred, and the part is primed and topcoated before it goes back on board. We measure on the first visit, cut and weld ashore while other work continues alongside, then return to fit. You keep the part, the fasteners and a dimensioned sketch of what was made.