SeaVision Marine Services LLCUnderwater Inspec� on in Lieu of Drydocking

A LYYN™ user with a clearer vision

At SeaVision Marine Services LLC, we perform a variety of underwater inves� ga� ons, such as hydrographic surveys, sidescan sonar surveys, marine magnetometer surveys, remote-operated vehicle inves� ga� ons, and bo� om sampling, in order to inspect places and things that are inaccessible to, or impercep� ble by, divers.

Drawing upon nearly ten years of experience in marine opera� ons to support diving and salvage opera� ons, underwater surveys, and engineering design and construc� on projects, SeaVision can provide these services with value-added management solu� ons that help waterfront and marine clients to be� er manage their resources.

When a hull inspec� on is required – such as the two inspec� ons of the outer hull of all sea-going vessels required every fi ve years by the American Bureau of Shipping (ABS) and the US Coast Guard (USCG) – the solu� on is normally an expensive dry-dock trip. One of these two inspec� ons can be carried out underwater while the vessel is afl oat, a so-called Underwater Inspec� on in Lieu of Drydocking (UWILD) survey. Divers can o� en accomplish the task, but ROVs are ideal due to their thoroughness and detailed recordkeeping, not to men� on the speed with which inspec� ons can be carried out, which is becoming important due to the increasing number of ships that need to be inspected.

Inspec� ons with an ROV do not require tagouts of intakes and ou� lows, nor are the safety regula� ons anywhere near as stringent as those when using divers. ROVs are not subject to physiological constraints – they can dive in water of any quality or temperature – to any depth required for hull inspec� on – for any length of � me and in sea condi� ons that would preclude the use of divers.

However, divers have the advantage of being able to use tac� le feedback to feel their way around a project site. Armed with knowledge of the surroundings prior to a dive, and communica� on with the surface during a dive, it is possible for divers to overcome poor visibility and use their hands, and other parts of their body, to navigate around a project site.

User Stories LYYN AB

LYYN is a product company working on image enhancement to improve visibility in various applica� ons. Many years of research in the human vision system and imaging technologies lie behind the company’s technology. LYYN off ers products and solu� ons based on a V.E.T. – Visibility Enhancement Technology – pla� orm. The technology can be applied to both s� ll and video digital images from most color cameras, in real � me and for post-processing of previously collected material. V.E.T. improves visibility in many situa� ons, for example, fog, haze, snow, rain, dust, darkness, etc., as well as in underwater and medical applica� ons. For examples please visit our website: www.lyyn.com.

“In order to be� er operate in the murky waters we o� en encounter, we are also u� lizing a LYYN T38™ Visual Enhancement Tool which helps to ’cut through’ turbid waters in order to improve visibility.“

Jeff rey Z. SnyderPresidentSeaVision Marine Services

Jeff Snyder

Underwater Inspec� on in Lieu of DrydockingA LYYN™ user with a clearer vision

ROVs, on the other hand, can not provide tac� le feedback to the operators. Even if armed with a manipulator arm, it may not be possible for an ROV to “turn around, face your rig, and take up your slack as you come back” in order to free an entangled umbilical. Instead, ROV operators rely on opera� onal strategies and a growing suite of technologies to improve or supplement their spa� al awareness in order to operate in environments with poor visibility.

“I recently completed two UWILD inspec� ons on vessels operated by one of the major off shore support vessel companies in the Gulf of Mexico that are homeported in the brown waters of Port Fourchon. We used two inspec� on class ROVs from SeaBo� x, in which the Integrated Control Console was equipped with LYYN™ image-enhancement boards. The LYYN™ visual enhancement was cri� cal to the overall performance. Even a� er traveling thirty miles off shore we only had about 5 to 8 feet of visibility, but the LYYN™ unit really helped to clear up the imagery.

The inspec� ons were performed in open water, and the ROVs were subject to currents and hull-generated turbulence. The inspec� ons required us to hover adjacent to azimuth thrusters on the vessels and perform 360-degree inspec� on of the thrusters, which posed signifi cant fouling risks. The LYYN™ visual enhancement system helped to increase the stand-off distance to the thrusters (thus helping to minimize the risk of fouling) and also helped to improve the overall video quality so that the ABS and USCG inspectors could assess the condi� on of the vessel.

The overall feedback from the inspectors, par� cularly regarding the improved video quality, has been very posi� ve. The combina� on of fi ber-op� c video off ered by these SeaBo� x systems, coupled with the integrated LYYN™ units, provides a nice video package for performing these inspec� ons.

This will allow ship owners to make considerable cost savings.”

Jeff rey Z. SnyderPresidentSeaVision Marine Services LLC

A misty morning on the road is not so misty anymore

How beau� ful is the garden in moonlight?

Finding New Yorkers in a blizzard...

...or soldiers in a sandstorm

The murky waters of the Bal� c Sea are suddenly more agreeable

Macroscopic or microscopic, whatever your need is, LYYN™ gives you a clearer vision.

SeaVision Marine Services LLC

LYYN ABIdeon Science ParkSE-223 70 Lund, SwedenPhone: +46 46 286 57 90info@lyyn.comwww.lyyn.com

User Stories LYYN AB

The azimuth thruster

Some corrosion found

The propeller blade sweeping by the camera

Another s� ll of the propeller blade