Shipping containers are standardised reusable storage unit used to transport materials and products efficiently and securely. Containers can be transferred from one mode of transportation to another, including ship, train and truck, without having to unload and reload its contents. Each container has a unique number used to keep track of its location and destination (just like a travel bug!).
To ship materials and goods using shipping containers, you would need to engage the services or lease the containers from one of the many companies involved in the business. Some of which are:
In Singapore, there are several container terminals including Tanjong Pagar, Keppel, Brani and Pasir Panjang. Cache is not in the middle of the sea, but at a spot with a view of one of Singapore's container terminals.
Have you managed to track where the cache is?
New cache location: deduct 10 from North coordinate solution.
Many thanks to wvm**** for allowing me to adopt the puzzle idea.