Section 2.1

Ship Types

&

Hull Forms

Classification of Ship by Usage

• Merchant Ship

• Naval & Coast Guard Vessel

• Recreational Vessel

• Utility Tugs

• Research & Environmental Ship

• Ferries

Classification of Ship by Support Type

• Aerostatic Support - ACV (Air Cushion Vehicles) - SES (Captured Air Bubble)

• Hydrodynamic Support - Hydrofoil

- HYSWAS (HYdrodynamic Small Waterplane Area Ship) -Planning Hull

• Hydrostatic Support - Conventional Ship - Catamaran

- SWATH (Small Waterplane Area Twin Hull) - Deep Displacement

• Submarine - Submarine - AUV/ROV

2.2.1 Aerostatic Support

- Supported by cushion of air generated by a fan. - ACV (Air Cushion Vehicle)

hull material : rubber propeller : placed on the deck amphibious operation - SES (Surface Effect Ship)

side hull : rigid wall(steel or FRP) bow : skirt propulsion system : placed under the water water jet propulsion supercavitating propeller not amphibious operation

E

SES Ferry

NYC SES Fireboat

250’ SES Ferry

• Planning HullPlanning Hull - supported by the hydrodynamic pressure developed - supported by the hydrodynamic pressure developed under the hull at high speedunder the hull at high speed - V or flat type shape- V or flat type shape - commonly used in pleasure boat, patrol boat,- commonly used in pleasure boat, patrol boat, missile boat, racing boat missile boat, racing boat

2.2.2 Hydrodynamic Support

Destriero

• Hydrofoil ShipHydrofoil Ship - - supported by a hydrofoil, like wing on an aircraftsupported by a hydrofoil, like wing on an aircraft - fully submerged hydrofoil ship- fully submerged hydrofoil ship - surface piercing hydrofoil ship- surface piercing hydrofoil ship

2.2.2 Hydrodynamic Support

Hydrofoil Ferry

HYSWAS Quest

Hydroplane vessel

2.2.3 Hydrostatic Support

• Displacement ship - conventional type of ship - carries high payload - low speed • SWATH - small waterplane area twin hull (SWATH) - low wave-making resistance - excellent roll stability - large open deck - disadvantage : deep draft and cost• Catamaran/Trimaran - twin hull - other characteristics are similar to the SWATH• Submarine

SWATH vessel

SWATH vessel Seashadow

Tri-Hull combat concept vessel