Chart Card Maintenance
Before we can learn how to correct the charts we want to use, we need
to learn the chart card system. The chart card system evolved from a
need to have a standard method of recording NTM corrections. It
wouldnt be practical to correct each and every chart listed in the weekly
NTM. The chart card systems allows the Quartermaster to record on a
card the NTM year and number for each chart in the ships allowance as
changes are made to these charts. Then the chart may be corrected as it
Illustrated in figure 1-21 are the steps to be followed to maintain the
card system. These steps are generic, individual units may need to
modify them to suit their needs. The following is a brief description of
The weekly Notice to Mariners is received on board.
The ready charts and any charts currently in use are checked
against the NTM to see if any need correction.
Example: write the NTM number (4/93) on the card, and put
the card(s) aside in a pile for later chart correction listed in step
Charge all affected cards. To charge cards means to enter on
the card the NTM number and year. See figure 1-18. This
must be done for publications also and in the same manner.
Update the broadcast message boards as needed from section
III of the NTM.
Correct ready charts and any affected charts that may be in use
as identified in step 2.
Correct any publications as listed in section II.
Pull (remove) all canceled charts and cards and destroy.
Make cards for new charts.