Galvanic Fatigue Calculator vs CH16

Galvanic Fatigue Calculator turns peer-reviewed sleep science into a practical passage-planning tool for offshore sailors. Enter your crew size, route, departure time, and pre-departure sleep — the app simulates hour-by-hour fatigue across every watch, expressed as Blood Alcohol Concentration equivalent (BAC%), the standard metric for cognitive impairment in occupational fatigue research. Under the hood, the app runs the McCauley Unified Model (McCauley et al., 2009, 2013; Ramakrishnan et al., 2016) — the same two-process biomathematical engine used in operational fatigue-risk management for aviation, shipping, and the military. It models homeostatic sleep pressure and the slow allostatic lower asymptote with closed-form analytical solutions, and layers circadian modulation on top. Features • Crew sizes 1–4 with auto-generated watch schedules • Route, speed, and duration planning • Sea-state selector: calm, moderate, rough, storm • Real-time fatigue gauge 0–0.20% BAC • Hour-by-hour chart and per-crew breakdown • Compare mode (what happens with one more crew?) • Share results • Languages: English, Spanish, French, German, Italian Free. No third-party ads. No trackers.

CH16 by Global SAR Hub is the essential maritime safety app for every seafarer. Instantly access contact details for over 350 maritime rescue coordination centers (MRCC, MRSC, JRCC, JRSC) worldwide. View Search and Rescue Regions (SRR) on an interactive map and identify the center responsible for your current position in real time. Generate IMO/GMDSS-compliant MAYDAY and PAN PAN distress messages with audio playback. Activate Man Overboard (MOB) mode to record a GPS position and guide you back to the drop point. NEW - Passage Plan: declare your route and automatically notify all rescue centers along your way, in their own language. An essential step for your safety at sea. Get notifications when you cross into a new SRR zone. Save your vessel and captain information to automatically include them in your messages and passage plans. Available in 6 languages. Works offline. Key features: • Global directory of 350+ maritime rescue centers • Interactive SRR zone map with automatic detection • GMDSS-compliant MAYDAY / PAN PAN message generator • Audio playback of distress messages • Man Overboard mode with GPS tracking and DMD format • Real-time MOB map view • Passage Plan: multilingual voyage declaration to RCCs • Persistent vessel and captain profiles • Voice recording of vessel name • SRR zone change notifications • Multilingual country search • 6 languages: EN, FR, ES, PT, IT, DE • Full offline mode Terms of Use (EULA): https://www.globalsarhub.com/terms-of-use.html Privacy Policy: https://www.globalsarhub.com/privacy-policy.html