Are you looking for something nautical related? Our directory is an extensive list of courses and places associated with the marine industry. Hop over and search now.
We believe every day’s a school day on a boat! That’s why we built Nautical Know-How, dedicated to answering your questions. Even better, if it can’t answer your question immediately, you can request it, and we’ll add it to our knowledge base.
Marine navigation has its own secret language, and let’s face it—half of it sounds like someone making things up after too much grog. You’ve got your ‘dead reckoning,’ which isn’t nearly as ominous as it sounds, and ‘bearing,’ which has nothing to do with polar bears but everything to do with pointing the right way. Don’t even get us started on ‘knots’—why measure speed like you’re tying a shoelace? And then there’s ‘fix (not for your engine) and ‘DR’ (spoiler: it’s not a doctor). If you’re baffled, don’t worry—we’re here to help you decipher this nautical code so you can sound like a pro, not a landlubber who’s lost their compass.
In a direction forward of the vessel’s starboard beam and to the right of its heading. The expression gives a relative sector rather than an exact bearing. A contact anywhere between nearly dead ahead and nearly abeam to starboard may be described this way, with a relative bearing or clock bearing added when greater precision…
In a direction abaft the vessel’s starboard beam and to the right of its centreline. The expression describes the relative sector between approximately abeam and astern on the starboard side rather than a single bearing. A more precise report can add relative bearing, clock position and distance. The sector moves with the vessel’s heading. A…
Directed or moving from the water towards the land. The term commonly describes wind, current, waves or movement relative to a coast. An onshore wind blows towards land; an onshore current sets towards it, but their directions need not be the same and can vary along an irregular coastline. Onshore conditions can create a lee-shore…
Rough, broken or confused water produced when strong flow passes over an irregular seabed or meets another stream. Overfalls commonly form near banks, shoals, ledges, headlands and abrupt changes of depth, where tidal flow is accelerated or disturbed. They can also occur where streams converge. The surface may become steep and chaotic even when nearby…
The sideways movement of a vessel through the water caused mainly by wind acting on its exposed surfaces. Leeway carries a vessel downwind of the direction in which it is heading. The leeway angle is the angle between the vessel’s heading and its resulting track through the water, and it varies with wind strength, point…
One section of a route or passage between two defined points. In a route made from waypoints, each leg begins at one waypoint and ends at the next. It has an intended direction and distance, and may also include a planned speed, estimated time and navigational constraints. Monitoring progress along a leg involves comparing the…
The vessel’s overall fore-and-aft length measured between the specified extreme points. LOA usually spans the foremost and aftermost permanent parts of the hull or vessel, but standards, marinas and authorities differ over whether bowsprits, pulpits, davits, rudders, outboards and other projections are included. It is therefore a defined measurement only when the convention is stated….
An enclosed section of a waterway in which the water level is changed to transfer vessels between different levels. A chamber is closed by gates and filled or emptied through sluices, culverts or pumps until its level matches the waterway ahead. Locks range from manually operated canal structures to large controlled systems for ships, and…
The distance or speed value indicated by a vessel’s log instrument at a recorded time. A cumulative distance-log reading is entered in the navigation record at regular intervals and compared with the previous reading to find distance run through the water. Some instruments also display instantaneous speed through the water. The reading is affected by…
If you belive the Earth is flat, you're about to fall of the end...
If you belive the Earth is flat, you're about to fall of the end...
What are you looking for?
Our 1% commitment
Funding permanent carbon removal
My Sailing Course contributes 1% of every Stripe payment to help promising carbon removal technologies move from the lab into the field.
1% of each paymentA £100 payment creates a £1 contribution from us.Selected for impactStripe works with scientific advisers to select early-stage carbon removal projects.Our contribution is automaticWe make the contribution after every eligible Stripe payment. Customers do not need to opt in or pay anything extra.
Stripe Climate commitments fund the development and purchase of carbon removal. They are not carbon offsets or credits attached to an individual order.
My Favourites
Notifications
MY SAILING COURSE
Hello, Visiting Sailor!
Welcome to My Sailing Course. Where's this adventure going to take you?
Your account details are encrypted in transit and your password is never displayed or stored by this form. By continuing, you agree to our Terms & Conditions and acknowledge our Privacy Policy.
Before you sail away…
Join free to save your favourites, unlock bonus learning resources and keep everything nautical close at hand.
MY SAILING COURSECreate your account
Join the My Sailing Course community with one secure account for your courses, profile and support.
✓
Welcome aboard!
We've successfully created your account. Hold station for a few moments and you will be returned to the page.