Marinised is when products have been specifically designed, redesigned or tested for use and long term survival in the harsh marine environment

Marine (ocean)

Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...

. This is done by many manufacturing industries worldwide including many military organisations (especially navies).

There are three main factors that need to be considered for a product to be truly marinised.

• Corrosion
  Corrosion
  Corrosion is the disintegration of an engineered material into its constituent atoms due to chemical reactions with its surroundings. In the most common use of the word, this means electrochemical oxidation of metals in reaction with an oxidant such as oxygen...
  
  
• Vibration
  Vibration
  Vibration refers to mechanical oscillations about an equilibrium point. The oscillations may be periodic such as the motion of a pendulum or random such as the movement of a tire on a gravel road.Vibration is occasionally "desirable"...
  
  
• A constantly changing attitude of the vessel. Similar to aircraft attitude

These three factors are a constant in the marine environment. Even on a dead calm day all three factors will still apply. This includes non salt water marine.

Electronics

Marinised electronics

Electronics

Electronics is the branch of science, engineering and technology that deals with electrical circuits involving active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies...

 are electronics that use one or more of the following protection methods. In most cases more than one method is used:

1. Coated by a spray or dipping to protect from salt air and water.
2. Fully encapsulated in some form of resin or gel.
3. Protected from Vibrations by specialised mounting of internal parts.
4. Special corrosion resistant solder and corrosion resistant metals are used

Metals

Marinised metals include some of the following examples:

1. Metals made up of alloys that do not corrode or resist corrosion. Ie. 316 marine grade Stainless steel
   Stainless steel
   In metallurgy, stainless steel, also known as inox steel or inox from French "inoxydable", is defined as a steel alloy with a minimum of 10.5 or 11% chromium content by mass....
   
   .
2. Metals that have been electroplated or dipped in a corrosion resistant material. Ie. Galvanised steel.
3. Metals that are painted with special anti rust or anti corrosion coatings.
4. Naturally resistant metals such as Brass are also considered marinised if manufactured to a high quality without impurities that corrode.
5. Plastic coated metals

Batteries

Marinised batteries are usually Gel battery or sealed maintenance free battery. Not using marinised batteries in salt water can be deadly in an enclosed environment for many reasons:

1. Sulfuric acid
   Sulfuric acid
   Sulfuric acid is a strong mineral acid with the molecular formula . Its historical name is oil of vitriol. Pure sulfuric acid is a highly corrosive, colorless, viscous liquid. The salts of sulfuric acid are called sulfates...
   
    and salt water are a dangerous combination. Mixing the two creates deadly chlorine
   Chlorine
   Chlorine is the chemical element with atomic number 17 and symbol Cl. It is the second lightest halogen, found in the periodic table in group 17. The element forms diatomic molecules under standard conditions, called dichlorine...
   
   gas. Therefore you must use a maintenance free sealed battery that is valve regulated.
2. The battery must have stronger plates and separators to compensate for constant vibrations and for impacts caused by large waves hitting the hull. If a standard battery is used and the plates collapse it can cause a short and electrical fire or explosion.
3. A marine battery must be capable of working at any angle due to the constant changing attitude of the vessel it is mounted in. Gel VRLA batteries are best for this purpose.