All the time we rely more and more upon our electronic charts and various other electronics onboard our boats, but they are only as accurate as their source data. Not only is it good practice to ensure that the source data is current and accurate, ensuring our technology is kept updated can unlock any number of upgrades not included in the software installed at time of purchase.
Rocks might not move, but areas are re-surveyed all the time – and sandbanks and mudbanks certainly do move, not to mention new buoyage and wrecks, which appear all around our coasts – and we need to take advantage of any updates.
Updating paper charts is a simple matter of consulting the updates given in a relevant Notice to Mariners and transferring these via a trusty purple pen to the chart.
That’s all very well, but few people go to sea these days without electronic charts on board. There’s, even more, need to update electronic charts than paper charts, especially as chart plotters display your position to a few metres on the chart and people sneak ever closer to obstructions, believing their charts and position to be accurate to the nearest centimetre. If anything, the accuracy of electronic charting is both its key draw and drawback.
Digital charts are available in a variety of formats and with varying levels of complexity and price. Each company offers a range of update products. You can just buy a new chart each time, but this can work out to be extremely expensive, so it’s worth putting in some time to research the options open to you.
CHART PLOTTERS
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