Sentence:  I blame the shoddy quality of Portuguese sea-charts for this, though doubtless the Portuguese would blame the compass, or the wind, or the water, or the Ceylonese, or the shape of the world, or the Moon, or anything else that might absolve their own <WSD>slack-handed</WSD> workmanship. 
Meaning of the word marked with <WSD> tags:  Done carelessly; slapdash.