Making assumptions about the dis-
played information and being compla-
cent by not verifying if the information
is correct or not is also a major con-
tributing factor. For vessels trading in
congested waters, the dense traffic and
proximity to land will greatly increase
the risks for the vessel. To be prepared
for these risks it is imperative that the
OOW is aware of errors and limits of his
navigation equipment, for example if the
OOW believes that 0.3 M is an accept-
able closest point of approach (CPA)
this could be dangerous if any of the
parameters feeding the radar calculation