Final answer:
Using the internal cargo bin door to hold up the external cargo bin door is not standard practice on container ships. Instead, container ships manage stability by internal BW transfers and prefer open ocean BW
Step-by-step explanation:
The correct answer is that it is not standard practice to use the internal cargo bin door to hold up the external cargo bin door on container ships. Container ships often adapt their operational behaviors for stability and ballast water (BW) management.
They can transfer BW internally among tanks to maintain stability during cargo operations, avoiding discharge and entrainment of ballast water. This is recognized as an accepted management approach, possibly more prevalent since BW management regulations came into effect in 2004.
Additionally, container ships have opted for entraining BW from open ocean sources rather than coastal sources, which reduces the need for ballast water exchange (BWE).
These practices highlight adaptations in response to environmental concerns and regulatory pressures rather than using structural elements like doors for purposes they are not designed for.
The question is asking whether it is okay to use the internal cargo bin door to hold up the external cargo bin door if necessary. In the context of container ships, they have the ability to transfer ballast water (BW) internally among tanks to provide stability during cargo operations.
This practice allows containers to hold their BW without discharging it and is an accepted management approach.
However, it is important to note that the question does not provide enough information to determine if using the internal cargo bin door to hold up the external cargo bin door is a common practice or if it is safe to do so.