The maritime sector is increasingly dependent on digital systems; systems that in many cases was initially designed without security in mind. At the same time, it is reported that the levels of information security awareness within the sector is low to non-existing. It is reported that low levels of information security awareness, and security issues with GNSS and AIS, are among the top 10 digital vulnerabilities within the maritime sector. There are several examples of how scientists have proven that the wireless systems can be manipulated, and how. This thesis, named Perceived Information Security in the Maritime Sector, aims to uncover the relationship between actual security in GPS and AIS, and how the stakeholders within the sector consider it to be. The initial hypothesis was that the considered security is higher than the actual security. To be able to view the trends of the sector, a survey was used to measure the respondent s views on GPS and AIS. The data gathered from the survey indicates that the stakeholders of the maritime sector is somewhat over-confident about both system security and potential impact if the systems are compromised.