When the ship is within 1 hour of port or anchorage and maintaining standard speed, the reduction gear lube oil temperature is lowered to what?

The correct answer indicates that when a ship is within 1 hour of port or anchorage and maintaining standard speed, the reduction gear lube oil temperature is lowered to a range of 10-15 degrees Fahrenheit or a minimum of 100 degrees.

This procedure is important for several reasons. First, reducing the temperature of the lube oil helps to maintain equipment efficiency and prolong the life of the reduction gear. By managing the temperature appropriately, the risk of overheating, which can lead to lubricant breakdown and potential mechanical failure, is mitigated.

The temperature range specified serves as a safeguard in ensuring that the lubricant remains effective in providing the necessary lubrication to the gears within the reduction system. If the temperature were to exceed the recommended range, the viscosity of the oil could change, impairing its lubricating properties and potentially leading to increased wear or damage.

Moreover, setting a minimum threshold of 100 degrees ensures that the lube oil is still in a fluid state, thus allowing it to perform adequately in its lubrication duties. This balance between not overheating and maintaining sufficient viscosity is crucial for the mechanical reliability of the ship's systems as it approaches port or anchorage.

Overall, the specified temperature maintenance is part of standard operating procedures designed to protect machinery and