Maritime Bunker Planning & Survey Suite
Offline shipboard desktop suite for voyage fuel planning and ASTM tank custody surveys.
Founding Product Engineer & Architect
Ship Captain Commission / Maritime Open Source
2026
Active Development
Executive Summary & Strategic Overview
Built an offline desktop suite commissioned by my grandfather, a deep-sea ship captain. Replaces fragile maritime spreadsheets with certified ASTM petroleum calculations for voyage fuel planning and tank custody surveys.
Verified Performance Metrics & Business Impact
Offline Operation
Zero external network calls, ensuring uninterrupted vessel operations during weeks at sea.
Test Driven
78 automated unit tests verify exact ASTM Table 54B and 56 mathematical parity.
Custody Verification
Automated sounding calculations match bunker delivery notes without manual spreadsheet formulas.
The Engineering Challenge
Deep-sea cargo ships operate mid-ocean without internet access. My grandfather and his crew relied on error-prone 56-column spreadsheets for bunker planning and tank custody soundings. Accidental formula overwrites caused inaccurate fuel orders, risking charter party disputes, financial penalties, or hazardous mid-voyage fuel starvation.
The Architectural Solution
Engineered an offline-first Tauri desktop application running React, TypeScript, and local Zustand state. Implemented exact ASTM Table 54B and Table 56 algorithms with automated dispute detection, bridge-compliant high-contrast themes, and 1-click sync between voyage forecasts and physical soundings.
Core Technical & Architectural Highlights
Certified ASTM Calculation Core
Implements ASTM D1250-80 Table 54B generalized products algorithms and Table 56 air buoyancy deductions (-0.0011 MT/m³).
Bridge Ergonomics & Offline Durability
Features red-amber night vision and high-contrast daylight palettes with auto-saving local state across unexpected shutdowns.
Voyage & Sounding Sync Bridge
Bridges pre-voyage fuel planning with post-bunkering tank soundings, auditing charter party redelivery targets automatically.
Agentic AI Pair Programming & Antigravity Acceleration
Engineered using Antigravity agentic workflows with strict TDD test loops, establishing mathematical benchmarks before implementing UI state.