PE Naval Architecture case studies
PE Naval Architecture · Put your knowledge to work in context.
The PE Naval Architecture and Marine Engineering is a professional engineer (PE) licensure examination administered by the National Council of Examiners for Engineering and Surveying (NCEES) for engineers who design, analyze, and support ships, boats, offshore units, and marine systems. Candidates are typically practicing naval architects, marine engineers, structural and hydrodynamic analysts, or port and shipyard engineers who have completed an accredited engineering degree and the required supervised experience under a state licensing board, and who now need to demonstrate minimum competence before licensure. The PE Naval Architecture case studies are 5 cases and about 3,981 words.
1Inclining Result and a Part-Loaded Centre Tank on a Converted Coastal Tanker
A 92 m double-hull coastal tanker (B = 15.0 m) has been converted to carry two cargo grades. After the conversion an inclining experiment was run at a displacement of 4,860 t with KM of 6.42 m: two 5.0 t weights were shifted 8.0 m transversely and a 6.5 m pendulum showed 195 mm deflection, giving an uncorrected GM of 0.55 m.
802 words, about 4 min2Sea Trial Speed Shortfall on a 32,000 t Bulk Carrier
A 32,000 t deadweight bulk carrier (Lpp 180 m, design draft 11.0 m, TPC 46 t/cm) is on sea trials. The contract guarantees 14.0 kn at 75% MCR in calm, deep water with a clean hull; MCR is 8,500 kW at 105 rev/min.
743 words, about 4 min3Fatigue Crack and Wasted Deck Plating at Second Special Survey
A 47,000 t deadweight product carrier built to CSR is at its second special survey (10 years). 4 port ballast wing tank the surveyor finds a 180 mm crack running from the toe of a bracket that connects a side-shell longitudinal to a transverse web frame, about 1.2 m above the tank top.
779 words, about 4 min4Sustained Rolling in Head Seas on a 6,500 TEU Container Ship
A 6,500 TEU container ship (L 300 m, B 42.8 m) is on passage at 14 kn in head seas and is rolling from about 3° up to 28° over roughly eight cycles, then the roll dies away when the master alters speed slightly, only to rebuild. The master reports no slamming and no green water on deck.
789 words, about 4 min5Closing a 420 t Deadweight Gap at the Detail-Design Gate
A yard is building a 50,000 t deadweight MR product carrier: L 183 m, B 32.2 m, D 17.8 m, scantling draught 12.2 m, TPC about 51 t/cm at the scantling draught. At the detail-design gate the steel weight has come out 420 t above the estimate used to fix the contract deadweight of 49,900 t; the lightweight is now 12,520 t, leaving 49,480 t, and the owner refuses any deadweight below 49,900 t because the charter is written on it.
868 words, about 4 min