Boating Knowledge Base

Have a sailing question? Access NauticEd’s sailing and boating knowledge base, and gain in-depth answers to your sailing questions. If you’re interested in powerboating, visit our new powerboating blog.

Vessels in Restricted Visibility

What is the safe speed at night, in fog? As safe as it needs to be under good seamanship.
August 28, 2023/by Grant Headifen
Sailboat docked at a marina with a neatly coiled rope on the pier under a clear blue sky.

Securing Your Sailboat

It is convenient to have dock lines that are pre-set to the right length with loops on the end and are permanently mounted onto the marina cleats. Now, when you return to the dock you simply slip the loops over your vessel cleats.
October 12, 2023/by Grant Headifen
Top view of a catamaran securely anchored with two lines, showcasing an optimal technique for stable mooring.

Mediterranean Mooring – Long Line Ashore

The long-line-ashore is a useful Mediterranean mooring method. It is mostly used in the Mediterranean as a customary way of mooring a lot of boats along a shoreline.
May 6, 2024/by Grant Headifen
Diagram showing forces: left image in equilibrium, right image with misaligned forces creating a moment.

Docking Force Alignment and Moment Balance

When you are docking, if your boat pulls on a line attached to the dock, the line pulls back on your boat. If the forces are aligned, then nothing really happens.
June 9, 2024/by Grant Headifen

Boat Heading vs Sail Set and Forces on the Sail

The set of your sail depends on your sailing angle to the wind. You're working to maximize the aerodynamic forces on the sail.
August 30, 2023/by Grant Headifen
Diagram showing the safety position of a sailboat with arrows indicating wind direction for safe navigation.

Understanding the Safety Position in Sailing

Learn how the Safety Position — a controlled, depowered close reach — helps sailors pause safely without losing steerage. Ideal for MOB drills, instruction, and more.
July 12, 2025/by Grant Headifen
Sailboat engine with labeled oil dipstick and water pump, showcasing essential maintenance points.

The Engine – Getting Familiar with a Charter Boat

While this is a sailing boat propelled by the wind and mostly without the need for burning fossil fuels the most devastating breakdown besides hull failure is the engine.
April 4, 2024/by Grant Headifen
Satellite image of hurricane approaching Caribbean islands, highlighting storm path critical for sailing safety.

Weather Predictions

While we have touched on weather concepts in this Module, no one can expect you to be a meteorologist (unless you are one) and do a good enough job at predicting the weather with enough quality to guarantee your safety.
October 13, 2023/by Grant Headifen
Diagram showing three sailboats docking with wind direction labeled, demonstrating optimal approach angles.

Leaving the Dock – End Ties

Wind pushing you away from the dock - This is the simplest scenario. Once you are confident of your plan, release and stow dock lines, then allow the wind to push the boat clear of other obstacles.
May 5, 2024/by Grant Headifen
Nautical chart symbols for rocks, wrecks, and obstructions, detailing dangers and depths for safe navigation.

Chart Symbols

Studying a harbor layout does very little good without understanding the symbols and what they signify. It pays to
October 17, 2023/by Grant Headifen

Sailboat Diesel Engine Fluids

Diesel engines make use of a variety of fluids, including raw and coolant water, diesel fuel, and lubricating oil. A problem in the flow of any one of these fluids can cause problems...
October 22, 2023/by Grant Headifen
Diagram showing 12V DC power inverted to 110V AC current with a waveform illustration and labeled inverter.

Sailboat Inverters

Sailboat Inverters are devices used to convert 12-volt DC battery electricity to AC 110-volt or 220-volt electricity. Special electronics in
October 13, 2023/by Grant Headifen
Disassembled marine toilet pump with clog evidence on white boat floor.

Sailing Vessel Preparation

Sometimes it is a good idea to get nasty stuff out of the way first as well as prepare your boat and crew.
October 25, 2023/by Grant Headifen
Sailing yacht gliding through ocean waves at sunset, sailor steering from deck, capturing adventure and freedom at sea.

Rigging

At boat shows, we see folks huddled down in the vessel’s salon oohing and aahing at the leather cushions to sit on, and at the electronic gadgets for navigation and entertainment.
October 24, 2023/by Grant Headifen

Docking Maneuvers with Dual Rudders

With Dual Rudders there is no ability to spring the boat onto or off the dock! You have no water velocity over the rudders from either boat velocity or propwash.
May 24, 2024/by Grant Headifen
Sailors securing a sailboat to a mooring buoy at sunset, against a backdrop of tranquil ocean and distant islands.

Mooring on a Charter

Most developed chartering locations throughout the world have established zones in which mooring balls have been permanently implanted.
April 12, 2024/by Grant Headifen

True Wind vs. Apparent Wind

Learn the basic difference between True Wind and Apparent Wind...
August 27, 2023/by Grant Headifen
West Marine deep cycle battery, Group 31, for reliable marine power and extended 105 amp hours performance.

Marine Batteries

The source of DC power is usually one or more marine-grade batteries, normally 12 volts each. They are similar to automobile batteries, except sturdier—and of course more expensive.
October 18, 2023/by Grant Headifen
Two sailboats on open sea with an arrow pointing from the red-hulled boat to the blue-hulled boat under a clear sky.

Terms Port – Starboard – Forward – Aft

In discussing sail trim, certain terminologies must be understood and so we are presenting a few basics to get you started
August 4, 2023/by Grant Headifen
Group of people planning a sailing route with a map and notes in a cozy room, discussing navigation strategies.

The Nautical Chart

Safely maneuvering a vessel while using positions derived from various coastal and near coastal sources is called coastal navigation.
October 24, 2023/by Grant Headifen
Raymarine ST6002 autopilot display showing course direction at 270 degrees, used in marine navigation.

The Autopilot on a Charter

The autopilot is a great tool for those long hauls and it’s probably better at holding a straight line than most of us.
April 10, 2024/by Grant Headifen
Two people in a dinghy on a calm sea with sailboats and green islands in the background under a cloudy sky.

Dinghy on a Bareboat Charter

Several things to note about the dinghy on a Bareboat Charter.
April 11, 2024/by Grant Headifen
Rule 2000 heavy-duty bilge pump with red and blue design for efficient water removal on boats.

Bilge Pumps

An emergency bilge pump(s) is a very significant electrical device on any vessel. This pump is used to pump out water that may collect, for whatever reason, in the bilge.
October 23, 2023/by Grant Headifen
Sailor in survival suit boarding liferaft from yacht for safety drill on calm water, emergency preparedness at sea.

Sinking

A boat sits down in the water until it has displaced the same weight of water as the weight of the boat. It is a universal arrangement between boat and water...
October 25, 2023/by Grant Headifen

Last updated on December 6th, 2024