Occasional Inspection must be conducted in the event of modifications or repairs that may affect the seaworthiness of the ship or the maintenance of human life safety, regardless of the timing of Special Inspection or Intermediate Inspection. However, this excludes repairs that involve replacing the engine-related items with certified products (type-approved products) for the first time.

• 【Modification】 Replacement of property related to the engine (things that affect the performance of the engine)

• 【Modification】 Changes to the main parts of the engine (things that affect the performance of the engine)

• 【Repair】 Work on the main parts of the engine (things that may affect the performance of the engine)

• 【Repair】 Work to change or replace electrical circuits installed in dangerous areas

• 【Repair】 Repair that involve replacing items related to the engine fixed on a ship with ones of the same performance or type (excluding items that may affect the performance of the engine)

• 【Repair】 Work that requires complex or special skills or equipment

　Examples of engines that require Occasional Inspection are summarized below. *As a general rule, you must have a thorough discussion with the ship inspector before starting any modification or repair. If you have any questions or concerns regarding individual procedures, please feel free to contact us.