Complex sentence: The customs officials suspected that the cargo might contain weapons to arm militant Icelandic home rulers who sought independence from Denmark, however the "SS Fanny" managed to escape into a gale and sailed outside Danish territorial waters.
Split into simpler sentences: The customs officials suspected that the cargo might contain weapons to arm militant Icelandic home rulers who sought independence from Denmark. The "SS Fanny" managed to escape into a gale and sailed outside Danish territorial waters.