RadarCop vs CaptainsDeck

RadarCop is a professional radar plotting assistant designed for mariners, deck officers, cadets, and bridge teams. The app helps perform manual radar plotting calculations using own ship and target observations. Enter three radar observations, assess relative motion, calculate CPA/TCPA, test trial maneuvers, save plotting history, and export a clean PDF plotting sheet. Main features: • Own ship course and speed input • Target bearing and range observations • Three-point radar plotting workflow • CPA and TCPA calculation • Target course and speed estimation • Trial maneuver calculation • Optional trial delay logic • Relative motion assessment • Radar-style plotting board • Calculation history • PDF export for record keeping or training • Built-in Help & User Guide RadarCop is useful for training, bridge preparation, radar plotting practice, and quick cross-checking of manual calculations. Important notice: RadarCop is a calculation aid only. It does not replace official navigation equipment, ARPA, ECDIS, radar, COLREGs, company procedures, or the professional judgment of the Officer of the Watch. All navigational decisions remain the responsibility of the vessel’s bridge team.

CaptainsDeck brings your boat's entire operation into one app: pre-departure checks, issue tracking, tank and fuel management, engine-hour based maintenance and a digital logbook. A CHECKLIST BUILT FOR YOUR BOAT - 74 brands, 1000+ models. Model-specific items (IPS pod check, shaft seal, saildrive bellows…) are included automatically. - Boat not listed? Add your own: pick propulsion and equipment, and the checklist is generated for your boat. - Edit technical values (tanks, cabins, seacocks) to match your boat; count targets and liter math update instantly. ISSUES AND NOTES - Photo-based issue logs; compare two photos side by side or as an overlay to track changes (perfect for bilge monitoring). TANKS AND COSTS - Fuel, water, grey/black levels; receipt-photo fuel logs; monthly and yearly fuel cost summary. Liters/gallons and currency options. MAINTENANCE AND REMINDERS - Engine-hour counter, rules like "oil every 100 hrs" with color countdowns, and dated reminders (flare expiry, raft service) with notifications. LOGBOOK AND REPORTS - Trips with departure/arrival, route, crew and engine hours; ending a trip updates the maintenance counter automatically. - Export the checklist as a signed PDF report for marinas, insurers or charter handovers. CREW SHARING - One share code keeps your captain and crew on the same boat: checks, issues, tank logs and trips sync across devices. Joining requires the owner's approval; access can be revoked anytime. Works fully offline — no internet needed at sea. No account required; your data stays on your device. Note: Catalog values are approximations derived from class typicals and can be edited in-app. CaptainsDeck is an aid and does not replace official maritime regulations or manufacturer instructions.