Particular care is necessary when docking down a destroyer or frigate to ensure that her rudder and propellers are not damaged by the keel-blocks.
Kufuneka kuqatshelwe xa kuhliswa inqanawa enesantya okanye isikhephe semfazwe ezibukweni ukuqinisekisa ukuba isixhobo sokuqhuba azonakaliswa zizakhiwo ezisembindini wezibuko.