Renewal / Extension of Registration on Delaware
Since registrations are related to calendar years (valid until 31 December of the year in which the vessel registered, namely until the registration is completed), the registration procedure is best done at the registration expiration or at the beginning of the year until the month of April, since thereafter there is an increase in the query and the registry often can not process all the requests in a timely manner, so you wait even for several months (in 2018, waiting for registration in the Delaware register in the period from May to September was over 60 days.)
What is also one of the benefits of this registry is that you can register the vessel before the expiration of registration. Namely, if your registration expires on December 31, the request can be submitted already on November 1st and will be valid by the end of next year (if the registration is for a period of one year).