With Modern ships having a lifespan of no more than 25 to 30 years before corrosion, metal fatigue and a lack of parts render them uneconomical to run, you will need to recycle the material from the ships after this time to make economic sense, especially steel can be recycled and made into new products.
This is considered to be one of the most labour intensive and dangerous industries in the world, WHJ projects are up for the challenge to salvage and recycle as much of your unusable ship as possible.