Possible Clues:

• Satellite's descent of little significance
• Insignificant amount ... or hint to this puzzle's shaded squares
• Does this explain the small amount of technique in overseas fishing industry? (1,4,2,3,5)
• Low tide, but it's not very important
• Splashdown is barely noticeable (1,4,2,3,5)
• It's not worth bothering about, unless you're flying overseas
• Insignificant result of walking the plank? (1,4,2,3,5)
• Minimal amount for a watery touch-down (1,4,2,3,5)
• Very small amount
• Ditching a trifle? (1,4,2,3,5)