If you have lost your ship in fleet but have not left fleet as you plan to reship your pod will slow down fleet warps.
FC’s will generally ask you to “Flag Exempt” from warp, and this is incredibly simple.
Simply click the hamburger menu in the fleet window:
Then select “Flag Exempt from Fleet Warp”.
Once you’ve reshipped, you can then undo this by finding the same menu option:
Now you won’t slow the fleet down!