DESIGN PROCESS - Valeriy Berezovsky - Naval Architect | Boat Designer | Yacht Designer

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, Part A – Hull and Stability
  • Final Design, Part B – Engineering

We base our quote and contract deliverables on these four 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, arrangements, and outboard profile sketches are prepared for review. These drawings serve a basis for the Preliminary Design.

Deliverables Phase 1 - Concept Design:

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

Phase 2 - Preliminary Design

The Preliminary Design phase begins with a review of the client's comments and requested modifications on the Concept Design which, if practical, will be incorporated into the design. The sketches are altered and reworked, if necessary. During this phase, the designer and client interaction are 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.

Then the preliminary 3D hull form is developed and optimized for beauty, performance and stability. Perspective views from various angles are provided to evaluate appearance. Preliminary construction drawings are developed to integrate the boat's structure with the accommodations. The weight summary is expanded and updated. Hydrostatics calculations are performed.

The Preliminary Design drawings form the basis for the Final Design and enable a professional yard to make a cost estimation.

Deliverables Phase 2 - Preliminary Design:

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

Phase 3 - Final Design, Part A – Hull and Stability

Final Design (phases 3, 4) are based on the client's approved Preliminary Design, and any client requested changes to the design after phase 3 commences, will be billed as an added contract cost. Changes are not easy to incorporate once Final Design begins.

In these last phases, the Final Design drawings are being prepared. Phase 3 produces the final hull, deck, and superstructure construction drawings. Engineering calculations for the hull structure are performed. All hull structures are engineered to meet requirements of ISO standards and/or Classification Society rules. Hull lines are faired. The weight summary, hydrostatics, and stability calculations are refined and finalized.

Deliverables Phase 3 - Final Design, Part A – Hull and Stability:

  • General Arrangement:
- Outboard Profile
- Sail Plan (if applicable)
- Deck Plan
- Interior Layout
  • Lines Plan (information relating to the 3D shape of the hull)
  • Construction Drawings of the Hull, Deck and Superstructure:
- Construction Plan and Longitudinal Sections
- Transverse Sections and Bulkheads
- Shell Expansion
- Fuel and Water Tanks (where integral with hull)
- Engine Foundation
- Chain Pates (if applicable)
- False Keel (if applicable)
- Construction Details
- Welded Connection Details (for metal hull)
- Laminate Schedule (for FRP hull)
- Material Specification
- Cutting Files (option)
  • Rudder (Blade, Stock, Trunk and Bearings)
  • Propeller Shaft Line & Brackets
  • Anchoring and Mooring Equipment
  • Openings in Hull, Deck and Superstructure
  • Weight and Centre of Gravity calculations
  • Hydrostatic and Stability calculations

Phase 4 - Final Design, Part B – Engineering

Phase 4 produces additional necessary details. Final engineering calculations are performed on the remainder of the vessel. The equipment list, specifications, velocity predictions and powering calculations are refined and finalized including final specification of propeller and shaft sizing. Electrical calculations are performed. Final machinery and systems drawings are produced.

Deliverables Phase 4 - Final Design, Part B – Engineering:

  • Technical Specifications and Equipment List
  • Masts and Rigging (if applicable)
  • Steering Gear System
  • Propulsion System
  • Engine Installation (Engine Room Layout)
  • Engine Exhaust System
  • Fuel and Water Tanks (Fills, Vents and Drains)
  • Fuel Piping Diagram
  • Water Piping Diagram
  • Bilge Piping Diagram
  • Electrical Schematic
  • LPG System (if applicable)
  • Fire Protection
  • Navigation Lights
  • Lifesaving and Safety Equipment
  • Discharge Prevention

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