The RNLN is the proud owner of four Walrus-class diesel-electric submarines. These domestic built submarines are unique in their performance. They are ‘expeditionary’ which means that they are able to carry out missions far from home, long lasting, autonomous and independent. The Walrus-class submarines are well dimensioned for a long endurance, but quite small by comparison to e.g. nuclear submarines; this also makes them suitable for operations in coastal, shallow waters. They are internationally considered one of the best in its class.