Monthly Archives: August 2017

Propeller Anti-Sing Edge – August 2017

As the summer begins to wind down, crews across all Subsea Global Solutions (SGS) offices are busy with various ship and construction projects. This month, SGS got the call to head north to Alaska, where a cruise vessel required an inspection on the propeller’s anti-singing edge (ASE) profile. The vessel could not utilize some cabins onboard the vessel due to excessive propeller noise at certain operating conditions.  SGS diver / propeller technicians entered the water and carefully inspected the condition of the blades. After close consultation with the client and a review of the operating issues the vessel was experiencing, it was determined that a new ASE profile installation was necessary.

ASE as found

ASE application by SGS dive / propeller technicians

The new ASE profile measurements were then scribed on all blades for both port and starboard propellers. The propeller blade trailing edges were effectively re-profiled using specialized hydraulic equipment specifically designed for quick and accurate edge restoration. Once complete, the OEM trained diver / propeller technicians hand filled the profiles of the newly formed anti-sing edge to OEM specifications.

Scribing

New ASE applied

The new edge successfully removed the singing, and allowed the vessel to begin re-booking the cabins that had been previously cancelled due to the noise. The vessel was able to depart on schedule, and the cruise line was happy to welcome more guests on board!  Subsea Global Solutions is your “One Source For Global Underwater Solutions”.

Blade Removal – July 2017

Last month, SGS Miami received an emergency call from a cruise vessel that was experiencing vibration in one of it’s propulsion units. An oil analysis of metal content proved that there was high probability of a component failure in the propulsion unit, which would increase the probability of a total loss to the propulsion unit. Working alongside the client, it was decided to secure the propulsion unit by removing the blades to prevent freewheeling during sailing.

The prep work was done during prior attendances to accommodate the vessel’s sailing schedule.  This ensured that the vessel could maintain its scheduled itinerary with no prolonged port stays. The prep workconsisted of the removal of the epoxy setting, welding of rigging pad eyes, the removal of blade lifting plugs, and the removal of bolt keepers.

When blade removal day arrived during the next scheduled call, SGS diver technicians removed all blades from the propulsion unit in record time!  As SGS has performed this service several times on prior vessels we were happy to report that this project was the most efficient and fastest this job has ever been performed! The client was thoroughly impressed by both how quickly we could provide them with a solution, and at how efficiently our operations progressed.  The vessel departed on schedule with SGS completing the work several hours early!

At SUBSEA GLOBAL SOLUTIONS we will always strive to exceed expectations – providing our clients with the most innovative, cost effective, high quality underwater solutions – anywhere in the world.