[SOLAS] 关于油舱测深管终止于机器处所的规范的理解？

2.2.3.5.1 Where sounding pipes are used, they shall not terminate in any space where the risk of ignition of

spillage from the sounding pipe might arise. In particular, they shall not terminate in passenger or crew

spaces. As a general rule, they shall not terminate in machinery spaces. However, where the Administration

considers that these latter requirements are impracticable, it may permit termination of sounding pipes in

machinery spaces on condition that all of the following requirements are met:

.1 an oil-level gauge is provided meeting the requirements of paragraph 2.2.3.5.2;

.2 the sounding pipes terminate in locations remote from ignition hazards unless precautions are

taken, such as the fitting of effective screens, to prevent the oil fuel in the case of spillage through

the terminations of the sounding pipes from coming into contact with a source of ignition; and

.3 the terminations of sounding pipes are fitted with self-closing blanking devices and with a small-

diameter self-closing control cock located below the blanking device for the purpose of ascertaining

before the blanking device is opened that oil fuel is not present. Provisions shall be made so as to

ensure that any spillage of oil fuel through the control cock involves no ignition hazard.

2.2.3.5.2 Other oil-level gauges may be used in place of sounding pipes subject to the following conditions:

.1 in passenger ships, such gauges shall not require penetration below the top of the tank and their

failure or overfilling of the tanks shall not permit release of fuel; and

.2 in cargo ships, the failure of such gauges or overfilling of the tank shall not permit release of fuel

into the space. The use of cylindrical gauge glasses is prohibited. The Administration may permit

the use of oil-level gauges with flat glasses and self-closing valves between the gauges and fuel

tanks.

我反复看这段规范，还是不理解，不知道这段要表达什么想法？感觉这段话相互矛盾。

我的理解是：

如果油舱设有测深管，并且油舱的测深管终止与机器与处所，则该测深管必须满足

2.2.3.5.1.2和

2.2.3.5.1.3，还必须有满足

2.2.3.5.2要求的液位计。或者满足

2.2.3.5.2要求的液位计，可以不需要测深管。

不知道我我这样理解是否正确，请指教，谢谢！