Your anchor is too small, you have undersized chain and your anchor is of wrong kind, of course!
Originally Posted by leopard46
Thinking of using a Delta 25kg anchor with 10mm chain as a primary anchor on our 2008 Leopard 46 11/12 tonne sailing cat.
For Your cat (length and weight) even heavier new gen (designed to meet SHHP standard) anchors are generally advised by manufacturers.
You can check Yourself at
Why the Mantus? | Mantus Anchors
Sizing Guide | Rocna Anchors // Rock Solid
and draw Your own conclusions.
The Delta is older generation anchor (HHP), so You need to add about
30 % of weight to have similar holding power.
And please remember - the sizing chart for Delta is some kind of a mystery - using it You will often choose anchor heavily undersized even for lunch hook use
And one thing more - it is Your choice of course, but why go for older generation product, when You can obtain new generation?
Of course, You can have Your reasons to do it
By the way, Your chain choice does not look undersized...