Page 33: of Maritime Reporter Magazine (April 2004)

Offshore Annual something unique in our undergraduate experience, which would have the potential to win both the International

Student

Offshore Design Competition (ISODC) as well as the Dr. James A. Lisnyk Ship

Design Competition (SNAME). Two of the group members, Lou and Vic, had worked in the offshore industry the pre- vious summer, which peaked our inter- est in that area. Then when looking at the offshore industry we had no knowl- edge of the exotic structures (DDCV's,

TLP's etc.) so we considered both drill- ships and FPSO's. While doing our research we realized that some of the newer drillships had the ability to per- form FPSO tasks, so we decided on a type of ship that was similar.

Q What do you feel is the most inno- vative/unique aspect of your project?

A It would probably be the Panama

Canal restriction. Most drillships with our oil carrying capacity have beams of 38-40 m while we were restricted to 32 m. The hull form was also very unique since it was based on a design for pro- duction strategy. It made modeling the vessel difficult and performing tasks like estimating resistance more chal- lenging. Also innovative is the ship's incredible capability. The intent of the design of Nereus is to meet or exceed the capabilities of every drillship in the world fleet. It does this through its capable drilling depth, large crude oil capacity, and versatile deck and propul- sion machinery designs.

Q What were the biggest challenges you faced in finalizing your project?

A This varied throughout the group.

For Lou, it was trying to develop a rea- sonable station keeping analysis for a dynamically positioned vessel since nothing was available through the department. For Vic, it was developing a reasonable electrical load analysis and coordinating that with the powering analysis. For Scott, it was the structural arrangement, meeting DnV require- ments while ensuring our design for pro- duction strategy. For Katie, it was mak- ing sure that all of the drawings were consistent with each other. A corollary to that would be to make sure that she was constantly working with the latest ver- sions and that the drawing reflected the latest design changes. For the entire group we had to make sure that every- one was aware of changes that were occurring and how they would affect the rest of the group and vice versa while being confined to a four-month design schedule.

Q How were these challenges over- come?

A Lou ended up running a time domain mooring simulation, which was developed in the department, but it was decided that a mooring simulation was too different than a dynamically posi- tioned system so we had to end up just using a static analysis as outlined in the

DNV rules. Vic was able to obtain help from industry to put together a reason- able load analysis, which was then used to determine our powering estimates.

Scott developed a design tool, which would incorporate the DNV rules to our design and modify the design to meet the requirements. Katie worked methodically and kept everything organ- ized. The entire group was constantly in contact with each other to make sure that everyone knew about modifications that

Looking For an IMO

A-60 Window ??

Deansteel Manufacturing now has USCG and

Lloyd's Registry certified IMO Marine windows!

A-0 through A-60 available.

Custom made, up to 40" X 60".

Certified for both interior and exterior use.

Available in mild and stainless steel.

Deansteel manufacturing is proud to announce our new line of IMO marine fire resistant windows. Deansteel has long been known in the offshore industry for top quality construction, durability, and dependable delivery; all at competitive pricing. Deansteel will continue in our tradition of excellence with this line of windows so you can be assured that when you buy Deansteel windows you are getting the very best.

DE^BTEEl www.deansteelmarine.com 800-825-8271 111 Merchants St.

San Antonio, TX 78204 210-226-8271 210-226-0913 fax

Circle 224 on Reader Service Card

Gas Generation Systems >- 600 Permea Maritime Protectiorf inert gas systems! •>- 300 Shipboard nitrogen systems! >• 90 Offshore nitrogen systems!

AIR J* PRODUCTS

AIR PRODUCTS AS

P.O. Box 8100 Vagsbygd, N-4675, Kristiansand

S„ NORWAY

Telephone: +47-380-39900 Telefax: +47-380-11113

E-mail: [email protected]

Smart Pneumatic Level

Sensor with Generic 4-20mA Output

The Bubbler is an electro-pneumatic level trans- mitter that allows remote level measurement using a 4-20mA analog output. The lack of air pressure poses no operational problems, due to an auto- matic one-way valve which closes as soon as the pressure drops below 1 bar, this prevents back flow in the bubbling line towards the transmitter.

Over pressure is also protected against by an automatic one-way valve. • It's the size of a grapefruit • Explosion proof housing • Accuracy .3% full scale • Automatic over-pressure valve • Automatic stop valve for air failure • Automatic cleaning of bubbling line • Connection for pressurized tanks • 2 pair 24 VDC and 4-20mA cable • Top or side mount

Many Options » Call today for more p| information!

ELECTRONIC MARINE

SYSTEMS, INC. 800 Ferndale Place

Rahway, NJ 07065 732.382.4344 732.388.5111 fax [email protected] e-mail http://www.emsmarcon.com

Circle 229 on Reader Service Card Circle 260 on Reader Service Card

April 2004 31