Naval Architecture Calculations Quick Reference Guide

Naval architecture calculations form the quantitative foundation for safe, efficient, and compliant vessel design and operation. Core domains include hydrostatics (e.g., displacement, center of buoyancy, metacentric height), hydrodynamics (resistance, propulsion, seakeeping), structural analysis (hull girder bending, local scantlings, fatigue), and stability (intact and damage stability per IMO A.167 and SOLAS Chapter II-1). These calculations rely on both empirical methods—such as Holtrop’s resistance estimation or Guldhammer-Hansen propeller charts—and first-principles approaches grounded in fluid mechanics, solid mechanics, and statistical wave theory. Modern practice integrates quick-reference analytical formulas with high-fidelity CFD and FEA tools; however, hand-calculations remain critical for conceptual design, verification, regulatory submissions, and troubleshooting. The guide also addresses standard unit systems (SI vs. Imperial), common approximations (e.g., Simpson’s Rule for waterplane area), safety factors, and regulatory thresholds—ensuring practitioners rapidly assess feasibility, iterate designs, and communicate technical rationale across multidisciplinary teams.