The chart house reads every signal. Name the channel (A / B / C / D), cite the sounding number if you have one, and describe what you need. Replies go out during regular China Standard Time business hours.海图室会读取每一个信号。请注明航道（A / B / C / D）、如有测深点编号请一并引用，并描述您的需求。我们将在北京时间工作时段内回复。
Find your category on the sounding chart — quoting H-13 or H-41 gets a sharper answer than describing the work loosely.先在测深图上找到您的业务类别——引用 H-13 或 H-41 比笼统描述能得到更精准的回复。
A written reply from the chart house, generally within two business days — signals are answered in the order they arrive.一般在两个工作日内收到海图室的书面回复——信号按到达顺序依次处理。
No quotes, contracts, or payment requests through this channel — see the Terms of Service.不通过此渠道报价、签约或索取付款——详见服务条款。