Which survival-knife-sharpening method do you use most frequently? (poll 9784925)

Which survival-knife-sharpening method do you use most frequently?

Sharpening at Home - I don't usually sharpen my knives in the field.

Pocket Stone - round or rectangular pocket whetstones or diamond stones

Ceramic Rod - with or without a stand

Combination Tool - Lansky Blademedic, Smith's Pocket Pal, or similar

Miscellaneous Hand Tools - metal files, sandpaper, etc.

Improvised Sharpener - concrete, bricks, river stones, glass, etc.

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