(S (S (BASENP (PRP They)) (VP (ADVP (RB also)) (VP (VBD recommended) (SBAR (IN that) (S (BASENP (NNS ships)) (VP (VP (VBP maintain) (BASENP (DT a) (JJR higher) (NN speed))) (CC and) (VP (VP (VBP report) (BASENP (DT any) (JJ unusual) (NNS incidents))) (PP (TO to) (BASENP (DT the) (JJ proper) (NNS authorities)))))))))) (PERIOD .))