DESIGN PROCESS - Valeriy Berezovsky - Naval Architect & Marine Designer

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The design process is classically subdivided into several phases:

  • Concept Design
  • Preliminary Design
  • Final Design

We base our quote and contract deliverables on these phases as described below.

Phase 1- Concept Design

The design process begins with the client provides an idea of what is desirable in the boat, its appearance, layout, performance etc., i.e. the concept that he has in mind. Any required structural details should be identified at this time. The client's initial requirements are reviewed and summarized. Conceptual specifications and rough general arrangement sketches are prepared for review. These documents serve a basis for the Preliminary Design.

Deliverables Phase 1 - Concept Design:

  • Concept Specifications
  • Concept General Arrangement:
- Sail Plan (if applicable)
- Outboard Profile
- Deck Plan
- Interior Layout Plan
  • Concept Weight Estimation

Phase 2 - Preliminary Design

This phase begins with a review of the client's comments and requested modifications on the Concept which, if practical, will be incorporated into the design. The Concept sketches are altered and reworked to produce drawings of a Preliminary Design.

3D model of the boat is developed and optimized for appearance and performance. Perspective views from various angles are provided.
Preliminary construction drawings are developed to integrate the boat's structure with the accommodations. The weight summary is updated, preliminary hydrostatics calculation and performance analysis are performed.

The Preliminary Design package will be presented for client review and comments, and all client requests will be incorporated before completion of the Preliminary Design phase.

During this Preliminary Design phase, the designer and client interaction is most important, since at the end of this phase the design will be frozen. "Frozen" means that the size, configuration, powering, structure, general arrangement, and all major equipment will have been defined. The subsequent design phases are for the purpose of preparing detailed engineering drawings and calculations for construction.

Deliverables Phase 2 - Preliminary Design:

  • Preliminary Specifications and Major Equipment List
  • Preliminary General Arrangement:
- Sail Plan  (if applicable)
- Outboard Profile
- Deck Plan
- Inboard Profile
- Interior Layout Plan
  • Preliminary Lines Plan, unfaired
  • Preliminary Hull Structural Plan and Midship Section
  • Preliminary Weight Estimation and Hydrostatics
  • Preliminary Performance Analysis

Phase 3 - Final Design

Final Design is based on the client's approved Preliminary Design, and any client requested changes to the design after this phase commences will be billed as an added contract cost. Changes are not easy to incorporate once Final Design begins.

In this last phase, the final drawings for construction are being prepared. All hull structures are engineered to meet requirements of ISO standards or Classification Society rules. Hull lines are faired. The final hull, deck, and superstructure construction drawings are produced. The weight summary, hydrostatics, and stability calculations are updated. The equipment list, specifications, velocity predictions and powering calculations are refined and finalized including final specification of propeller and shaft sizing. Final engineering and electrical calculations are performed. Final machinery and systems drawings are produced.

Deliverables Phase 3 - Final Design:

  • Technical Specification and Equipment List
  • General Arrangement:
- Sail Plan (if applicable)
- Outboard Profile
- Deck Plan
- Inboard Profile
- Interior Layout Plan
  • Lines Plan
  • Scantlings Calculations
  • Construction Drawings of the Hull, Deck and Superstructure:
- Structural Plan and Longitudinal Sections
- Transverse Sections and Bulkheads
- Shell Expansion
- Fuel and Water Tanks
- Engine Foundation
- Chain Pates (if applicable)
- False Keel (if applicable)
- Construction Details
- Welded Connection Details (for metal hull)
- Laminate Schedule (for FRP hull)
  • Openings in Hull, Deck and Superstructure
  • Weight and Centre of Gravity calculations
  • Hydrostatic and Stability calculations
  • Masts and Rigging (if applicable)
  • Anchoring and Mooring Equipment
  • Steering Gear System
  • Rudder (Blade, Stock, Trunk and Bearings)
  • Propulsion System
  • Propeller Shaft Line & Brackets
  • Engine Installation (Engine Room Layout)
  • Engine Exhaust System
  • Engine Cooling System
  • Ventilation System
  • Fuel and Water Tanks (Fills, Vents and Drains)
  • Fuel Piping Diagram
  • Water Piping Diagram
  • Bilge System
  • Electrical Schematic
  • LPG System (if applicable)
  • Fire Protection
  • Navigation Lights
  • Lifesaving and Safety Equipment
  • Discharge Prevention

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