InterManager-International Ship Managers’ Association (ISMA) The International Ship Managers’ Association – InterManager – is a trade association representing the views of the practitioners in ship management, both third party managers and in-house managers, at the IMO, with governments and industry. InterManager seeks to encourage the highest standards in ship management through innovation, creativity and knowledge sharing. Experience shows that a compliance culture doesn’t lead to the highest standards: quality comes from self regulation with verification.