Maritime Knowledge Base
Browse questions and answers across marine machinery, merchant navy careers, shipboard operations and maritime glossary terms.
Browse by Category
Marine Machinery
Troubleshooting guides for pumps, boilers, purifiers, compressors and auxiliary systems.
Merchant Navy Careers
Questions about joining the merchant navy, exams, cadetships, ranks and sea-time.
Maritime Glossary
Plain-English definitions of shipping, engine-room, navigation and regulatory terms.
Shipboard Operations
Practical Q&A for watchkeeping, safety, maintenance routines and onboard documentation.
Results for "ECDIS"
What is the man overboard (MOB) procedure on a ship?
When someone falls overboard, immediate, drilled actions — raising the alarm, marking the position and turning the ship back — give the best chance of recovery.
Shipboard OperationsWhat are the four stages of passage planning (appraisal, planning, execution, monitoring)?
Passage planning follows four stages — appraisal, planning, execution and monitoring — that together prepare and carry out a safe voyage from berth to berth.
Shipboard OperationsHow does marine radar and ARPA work?
Marine radar detects other ships and land by transmitting radio pulses and timing their echoes; ARPA automatically tracks targets and calculates the risk of collision.
Shipboard OperationsWhat is dead reckoning in navigation?
Dead reckoning is estimating a ship's present position from a known past position by applying the course steered and the distance run, without reference to external fixes.
Shipboard OperationsWhat is a gyrocompass and how does it differ from a magnetic compass?
A gyrocompass is a navigation instrument that uses a fast-spinning gyroscope to find and hold true north, unaffected by the ship's magnetism, providing a true heading to the ship's systems.
Shipboard OperationsHow do you read a nautical chart?
A nautical chart is a map of the sea showing depths, dangers, aids to navigation and the coastline, read using its scales of latitude and longitude, soundings, symbols and compass rose.
